// Copyright (c) 2015, Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// DO NOT EDIT.
// swift-format-ignore-file
//
// Generated by the gRPC Swift generator plugin for the protocol buffer compiler.
// Source: echo.proto
//
// For information on using the generated types, please see the documentation:
//   https://github.com/grpc/grpc-swift

import GRPCCore
import GRPCProtobuf

// MARK: - echo.Echo

/// Namespace containing generated types for the "echo.Echo" service.
internal enum Echo_Echo {
    /// Service descriptor for the "echo.Echo" service.
    internal static let descriptor = GRPCCore.ServiceDescriptor(fullyQualifiedService: "echo.Echo")
    /// Namespace for method metadata.
    internal enum Method {
        /// Namespace for "Get" metadata.
        internal enum Get {
            /// Request type for "Get".
            internal typealias Input = Echo_EchoRequest
            /// Response type for "Get".
            internal typealias Output = Echo_EchoResponse
            /// Descriptor for "Get".
            internal static let descriptor = GRPCCore.MethodDescriptor(
                service: GRPCCore.ServiceDescriptor(fullyQualifiedService: "echo.Echo"),
                method: "Get"
            )
        }
        /// Namespace for "Expand" metadata.
        internal enum Expand {
            /// Request type for "Expand".
            internal typealias Input = Echo_EchoRequest
            /// Response type for "Expand".
            internal typealias Output = Echo_EchoResponse
            /// Descriptor for "Expand".
            internal static let descriptor = GRPCCore.MethodDescriptor(
                service: GRPCCore.ServiceDescriptor(fullyQualifiedService: "echo.Echo"),
                method: "Expand"
            )
        }
        /// Namespace for "Collect" metadata.
        internal enum Collect {
            /// Request type for "Collect".
            internal typealias Input = Echo_EchoRequest
            /// Response type for "Collect".
            internal typealias Output = Echo_EchoResponse
            /// Descriptor for "Collect".
            internal static let descriptor = GRPCCore.MethodDescriptor(
                service: GRPCCore.ServiceDescriptor(fullyQualifiedService: "echo.Echo"),
                method: "Collect"
            )
        }
        /// Namespace for "Update" metadata.
        internal enum Update {
            /// Request type for "Update".
            internal typealias Input = Echo_EchoRequest
            /// Response type for "Update".
            internal typealias Output = Echo_EchoResponse
            /// Descriptor for "Update".
            internal static let descriptor = GRPCCore.MethodDescriptor(
                service: GRPCCore.ServiceDescriptor(fullyQualifiedService: "echo.Echo"),
                method: "Update"
            )
        }
        /// Descriptors for all methods in the "echo.Echo" service.
        internal static let descriptors: [GRPCCore.MethodDescriptor] = [
            Get.descriptor,
            Expand.descriptor,
            Collect.descriptor,
            Update.descriptor
        ]
    }
}

extension GRPCCore.ServiceDescriptor {
    /// Service descriptor for the "echo.Echo" service.
    internal static let echo_Echo = GRPCCore.ServiceDescriptor(fullyQualifiedService: "echo.Echo")
}

// MARK: echo.Echo (server)

extension Echo_Echo {
    /// Streaming variant of the service protocol for the "echo.Echo" service.
    ///
    /// This protocol is the lowest-level of the service protocols generated for this service
    /// giving you the most flexibility over the implementation of your service. This comes at
    /// the cost of more verbose and less strict APIs. Each RPC requires you to implement it in
    /// terms of a request stream and response stream. Where only a single request or response
    /// message is expected, you are responsible for enforcing this invariant is maintained.
    ///
    /// Where possible, prefer using the stricter, less-verbose ``ServiceProtocol``
    /// or ``SimpleServiceProtocol`` instead.
    internal protocol StreamingServiceProtocol: GRPCCore.RegistrableRPCService {
        /// Handle the "Get" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Immediately returns an echo of a request.
        ///
        /// - Parameters:
        ///   - request: A streaming request of `Echo_EchoRequest` messages.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        /// - Returns: A streaming response of `Echo_EchoResponse` messages.
        func get(
            request: GRPCCore.StreamingServerRequest<Echo_EchoRequest>,
            context: GRPCCore.ServerContext
        ) async throws -> GRPCCore.StreamingServerResponse<Echo_EchoResponse>

        /// Handle the "Expand" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Splits a request into words and returns each word in a stream of messages.
        ///
        /// - Parameters:
        ///   - request: A streaming request of `Echo_EchoRequest` messages.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        /// - Returns: A streaming response of `Echo_EchoResponse` messages.
        func expand(
            request: GRPCCore.StreamingServerRequest<Echo_EchoRequest>,
            context: GRPCCore.ServerContext
        ) async throws -> GRPCCore.StreamingServerResponse<Echo_EchoResponse>

        /// Handle the "Collect" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Collects a stream of messages and returns them concatenated when the caller closes.
        ///
        /// - Parameters:
        ///   - request: A streaming request of `Echo_EchoRequest` messages.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        /// - Returns: A streaming response of `Echo_EchoResponse` messages.
        func collect(
            request: GRPCCore.StreamingServerRequest<Echo_EchoRequest>,
            context: GRPCCore.ServerContext
        ) async throws -> GRPCCore.StreamingServerResponse<Echo_EchoResponse>

        /// Handle the "Update" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Streams back messages as they are received in an input stream.
        ///
        /// - Parameters:
        ///   - request: A streaming request of `Echo_EchoRequest` messages.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        /// - Returns: A streaming response of `Echo_EchoResponse` messages.
        func update(
            request: GRPCCore.StreamingServerRequest<Echo_EchoRequest>,
            context: GRPCCore.ServerContext
        ) async throws -> GRPCCore.StreamingServerResponse<Echo_EchoResponse>
    }

    /// Service protocol for the "echo.Echo" service.
    ///
    /// This protocol is higher level than ``StreamingServiceProtocol`` but lower level than
    /// the ``SimpleServiceProtocol``, it provides access to request and response metadata and
    /// trailing response metadata. If you don't need these then consider using
    /// the ``SimpleServiceProtocol``. If you need fine grained control over your RPCs then
    /// use ``StreamingServiceProtocol``.
    internal protocol ServiceProtocol: Echo_Echo.StreamingServiceProtocol {
        /// Handle the "Get" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Immediately returns an echo of a request.
        ///
        /// - Parameters:
        ///   - request: A request containing a single `Echo_EchoRequest` message.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        /// - Returns: A response containing a single `Echo_EchoResponse` message.
        func get(
            request: GRPCCore.ServerRequest<Echo_EchoRequest>,
            context: GRPCCore.ServerContext
        ) async throws -> GRPCCore.ServerResponse<Echo_EchoResponse>

        /// Handle the "Expand" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Splits a request into words and returns each word in a stream of messages.
        ///
        /// - Parameters:
        ///   - request: A request containing a single `Echo_EchoRequest` message.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        /// - Returns: A streaming response of `Echo_EchoResponse` messages.
        func expand(
            request: GRPCCore.ServerRequest<Echo_EchoRequest>,
            context: GRPCCore.ServerContext
        ) async throws -> GRPCCore.StreamingServerResponse<Echo_EchoResponse>

        /// Handle the "Collect" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Collects a stream of messages and returns them concatenated when the caller closes.
        ///
        /// - Parameters:
        ///   - request: A streaming request of `Echo_EchoRequest` messages.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        /// - Returns: A response containing a single `Echo_EchoResponse` message.
        func collect(
            request: GRPCCore.StreamingServerRequest<Echo_EchoRequest>,
            context: GRPCCore.ServerContext
        ) async throws -> GRPCCore.ServerResponse<Echo_EchoResponse>

        /// Handle the "Update" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Streams back messages as they are received in an input stream.
        ///
        /// - Parameters:
        ///   - request: A streaming request of `Echo_EchoRequest` messages.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        /// - Returns: A streaming response of `Echo_EchoResponse` messages.
        func update(
            request: GRPCCore.StreamingServerRequest<Echo_EchoRequest>,
            context: GRPCCore.ServerContext
        ) async throws -> GRPCCore.StreamingServerResponse<Echo_EchoResponse>
    }

    /// Simple service protocol for the "echo.Echo" service.
    ///
    /// This is the highest level protocol for the service. The API is the easiest to use but
    /// doesn't provide access to request or response metadata. If you need access to these
    /// then use ``ServiceProtocol`` instead.
    internal protocol SimpleServiceProtocol: Echo_Echo.ServiceProtocol {
        /// Handle the "Get" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Immediately returns an echo of a request.
        ///
        /// - Parameters:
        ///   - request: A `Echo_EchoRequest` message.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        /// - Returns: A `Echo_EchoResponse` to respond with.
        func get(
            request: Echo_EchoRequest,
            context: GRPCCore.ServerContext
        ) async throws -> Echo_EchoResponse

        /// Handle the "Expand" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Splits a request into words and returns each word in a stream of messages.
        ///
        /// - Parameters:
        ///   - request: A `Echo_EchoRequest` message.
        ///   - response: A response stream of `Echo_EchoResponse` messages.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        func expand(
            request: Echo_EchoRequest,
            response: GRPCCore.RPCWriter<Echo_EchoResponse>,
            context: GRPCCore.ServerContext
        ) async throws

        /// Handle the "Collect" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Collects a stream of messages and returns them concatenated when the caller closes.
        ///
        /// - Parameters:
        ///   - request: A stream of `Echo_EchoRequest` messages.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        /// - Returns: A `Echo_EchoResponse` to respond with.
        func collect(
            request: GRPCCore.RPCAsyncSequence<Echo_EchoRequest, any Swift.Error>,
            context: GRPCCore.ServerContext
        ) async throws -> Echo_EchoResponse

        /// Handle the "Update" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Streams back messages as they are received in an input stream.
        ///
        /// - Parameters:
        ///   - request: A stream of `Echo_EchoRequest` messages.
        ///   - response: A response stream of `Echo_EchoResponse` messages.
        ///   - context: Context providing information about the RPC.
        /// - Throws: Any error which occurred during the processing of the request. Thrown errors
        ///     of type `RPCError` are mapped to appropriate statuses. All other errors are converted
        ///     to an internal error.
        func update(
            request: GRPCCore.RPCAsyncSequence<Echo_EchoRequest, any Swift.Error>,
            response: GRPCCore.RPCWriter<Echo_EchoResponse>,
            context: GRPCCore.ServerContext
        ) async throws
    }
}

// Default implementation of 'registerMethods(with:)'.
extension Echo_Echo.StreamingServiceProtocol {
    internal func registerMethods(with router: inout GRPCCore.RPCRouter) {
        router.registerHandler(
            forMethod: Echo_Echo.Method.Get.descriptor,
            deserializer: GRPCProtobuf.ProtobufDeserializer<Echo_EchoRequest>(),
            serializer: GRPCProtobuf.ProtobufSerializer<Echo_EchoResponse>(),
            handler: { request, context in
                try await self.get(
                    request: request,
                    context: context
                )
            }
        )
        router.registerHandler(
            forMethod: Echo_Echo.Method.Expand.descriptor,
            deserializer: GRPCProtobuf.ProtobufDeserializer<Echo_EchoRequest>(),
            serializer: GRPCProtobuf.ProtobufSerializer<Echo_EchoResponse>(),
            handler: { request, context in
                try await self.expand(
                    request: request,
                    context: context
                )
            }
        )
        router.registerHandler(
            forMethod: Echo_Echo.Method.Collect.descriptor,
            deserializer: GRPCProtobuf.ProtobufDeserializer<Echo_EchoRequest>(),
            serializer: GRPCProtobuf.ProtobufSerializer<Echo_EchoResponse>(),
            handler: { request, context in
                try await self.collect(
                    request: request,
                    context: context
                )
            }
        )
        router.registerHandler(
            forMethod: Echo_Echo.Method.Update.descriptor,
            deserializer: GRPCProtobuf.ProtobufDeserializer<Echo_EchoRequest>(),
            serializer: GRPCProtobuf.ProtobufSerializer<Echo_EchoResponse>(),
            handler: { request, context in
                try await self.update(
                    request: request,
                    context: context
                )
            }
        )
    }
}

// Default implementation of streaming methods from 'StreamingServiceProtocol'.
extension Echo_Echo.ServiceProtocol {
    internal func get(
        request: GRPCCore.StreamingServerRequest<Echo_EchoRequest>,
        context: GRPCCore.ServerContext
    ) async throws -> GRPCCore.StreamingServerResponse<Echo_EchoResponse> {
        let response = try await self.get(
            request: GRPCCore.ServerRequest(stream: request),
            context: context
        )
        return GRPCCore.StreamingServerResponse(single: response)
    }

    internal func expand(
        request: GRPCCore.StreamingServerRequest<Echo_EchoRequest>,
        context: GRPCCore.ServerContext
    ) async throws -> GRPCCore.StreamingServerResponse<Echo_EchoResponse> {
        let response = try await self.expand(
            request: GRPCCore.ServerRequest(stream: request),
            context: context
        )
        return response
    }

    internal func collect(
        request: GRPCCore.StreamingServerRequest<Echo_EchoRequest>,
        context: GRPCCore.ServerContext
    ) async throws -> GRPCCore.StreamingServerResponse<Echo_EchoResponse> {
        let response = try await self.collect(
            request: request,
            context: context
        )
        return GRPCCore.StreamingServerResponse(single: response)
    }
}

// Default implementation of methods from 'ServiceProtocol'.
extension Echo_Echo.SimpleServiceProtocol {
    internal func get(
        request: GRPCCore.ServerRequest<Echo_EchoRequest>,
        context: GRPCCore.ServerContext
    ) async throws -> GRPCCore.ServerResponse<Echo_EchoResponse> {
        return GRPCCore.ServerResponse<Echo_EchoResponse>(
            message: try await self.get(
                request: request.message,
                context: context
            ),
            metadata: [:]
        )
    }

    internal func expand(
        request: GRPCCore.ServerRequest<Echo_EchoRequest>,
        context: GRPCCore.ServerContext
    ) async throws -> GRPCCore.StreamingServerResponse<Echo_EchoResponse> {
        return GRPCCore.StreamingServerResponse<Echo_EchoResponse>(
            metadata: [:],
            producer: { writer in
                try await self.expand(
                    request: request.message,
                    response: writer,
                    context: context
                )
                return [:]
            }
        )
    }

    internal func collect(
        request: GRPCCore.StreamingServerRequest<Echo_EchoRequest>,
        context: GRPCCore.ServerContext
    ) async throws -> GRPCCore.ServerResponse<Echo_EchoResponse> {
        return GRPCCore.ServerResponse<Echo_EchoResponse>(
            message: try await self.collect(
                request: request.messages,
                context: context
            ),
            metadata: [:]
        )
    }

    internal func update(
        request: GRPCCore.StreamingServerRequest<Echo_EchoRequest>,
        context: GRPCCore.ServerContext
    ) async throws -> GRPCCore.StreamingServerResponse<Echo_EchoResponse> {
        return GRPCCore.StreamingServerResponse<Echo_EchoResponse>(
            metadata: [:],
            producer: { writer in
                try await self.update(
                    request: request.messages,
                    response: writer,
                    context: context
                )
                return [:]
            }
        )
    }
}

// MARK: echo.Echo (client)

extension Echo_Echo {
    /// Generated client protocol for the "echo.Echo" service.
    ///
    /// You don't need to implement this protocol directly, use the generated
    /// implementation, ``Client``.
    internal protocol ClientProtocol: Sendable {
        /// Call the "Get" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Immediately returns an echo of a request.
        ///
        /// - Parameters:
        ///   - request: A request containing a single `Echo_EchoRequest` message.
        ///   - serializer: A serializer for `Echo_EchoRequest` messages.
        ///   - deserializer: A deserializer for `Echo_EchoResponse` messages.
        ///   - options: Options to apply to this RPC.
        ///   - handleResponse: A closure which handles the response, the result of which is
        ///       returned to the caller. Returning from the closure will cancel the RPC if it
        ///       hasn't already finished.
        /// - Returns: The result of `handleResponse`.
        func get<Result>(
            request: GRPCCore.ClientRequest<Echo_EchoRequest>,
            serializer: some GRPCCore.MessageSerializer<Echo_EchoRequest>,
            deserializer: some GRPCCore.MessageDeserializer<Echo_EchoResponse>,
            options: GRPCCore.CallOptions,
            onResponse handleResponse: @Sendable @escaping (GRPCCore.ClientResponse<Echo_EchoResponse>) async throws -> Result
        ) async throws -> Result where Result: Sendable

        /// Call the "Expand" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Splits a request into words and returns each word in a stream of messages.
        ///
        /// - Parameters:
        ///   - request: A request containing a single `Echo_EchoRequest` message.
        ///   - serializer: A serializer for `Echo_EchoRequest` messages.
        ///   - deserializer: A deserializer for `Echo_EchoResponse` messages.
        ///   - options: Options to apply to this RPC.
        ///   - handleResponse: A closure which handles the response, the result of which is
        ///       returned to the caller. Returning from the closure will cancel the RPC if it
        ///       hasn't already finished.
        /// - Returns: The result of `handleResponse`.
        func expand<Result>(
            request: GRPCCore.ClientRequest<Echo_EchoRequest>,
            serializer: some GRPCCore.MessageSerializer<Echo_EchoRequest>,
            deserializer: some GRPCCore.MessageDeserializer<Echo_EchoResponse>,
            options: GRPCCore.CallOptions,
            onResponse handleResponse: @Sendable @escaping (GRPCCore.StreamingClientResponse<Echo_EchoResponse>) async throws -> Result
        ) async throws -> Result where Result: Sendable

        /// Call the "Collect" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Collects a stream of messages and returns them concatenated when the caller closes.
        ///
        /// - Parameters:
        ///   - request: A streaming request producing `Echo_EchoRequest` messages.
        ///   - serializer: A serializer for `Echo_EchoRequest` messages.
        ///   - deserializer: A deserializer for `Echo_EchoResponse` messages.
        ///   - options: Options to apply to this RPC.
        ///   - handleResponse: A closure which handles the response, the result of which is
        ///       returned to the caller. Returning from the closure will cancel the RPC if it
        ///       hasn't already finished.
        /// - Returns: The result of `handleResponse`.
        func collect<Result>(
            request: GRPCCore.StreamingClientRequest<Echo_EchoRequest>,
            serializer: some GRPCCore.MessageSerializer<Echo_EchoRequest>,
            deserializer: some GRPCCore.MessageDeserializer<Echo_EchoResponse>,
            options: GRPCCore.CallOptions,
            onResponse handleResponse: @Sendable @escaping (GRPCCore.ClientResponse<Echo_EchoResponse>) async throws -> Result
        ) async throws -> Result where Result: Sendable

        /// Call the "Update" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Streams back messages as they are received in an input stream.
        ///
        /// - Parameters:
        ///   - request: A streaming request producing `Echo_EchoRequest` messages.
        ///   - serializer: A serializer for `Echo_EchoRequest` messages.
        ///   - deserializer: A deserializer for `Echo_EchoResponse` messages.
        ///   - options: Options to apply to this RPC.
        ///   - handleResponse: A closure which handles the response, the result of which is
        ///       returned to the caller. Returning from the closure will cancel the RPC if it
        ///       hasn't already finished.
        /// - Returns: The result of `handleResponse`.
        func update<Result>(
            request: GRPCCore.StreamingClientRequest<Echo_EchoRequest>,
            serializer: some GRPCCore.MessageSerializer<Echo_EchoRequest>,
            deserializer: some GRPCCore.MessageDeserializer<Echo_EchoResponse>,
            options: GRPCCore.CallOptions,
            onResponse handleResponse: @Sendable @escaping (GRPCCore.StreamingClientResponse<Echo_EchoResponse>) async throws -> Result
        ) async throws -> Result where Result: Sendable
    }

    /// Generated client for the "echo.Echo" service.
    ///
    /// The ``Client`` provides an implementation of ``ClientProtocol`` which wraps
    /// a `GRPCCore.GRPCCClient`. The underlying `GRPCClient` provides the long-lived
    /// means of communication with the remote peer.
    internal struct Client: ClientProtocol {
        private let client: GRPCCore.GRPCClient

        /// Creates a new client wrapping the provided `GRPCCore.GRPCClient`.
        ///
        /// - Parameters:
        ///   - client: A `GRPCCore.GRPCClient` providing a communication channel to the service.
        internal init(wrapping client: GRPCCore.GRPCClient) {
            self.client = client
        }

        /// Call the "Get" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Immediately returns an echo of a request.
        ///
        /// - Parameters:
        ///   - request: A request containing a single `Echo_EchoRequest` message.
        ///   - serializer: A serializer for `Echo_EchoRequest` messages.
        ///   - deserializer: A deserializer for `Echo_EchoResponse` messages.
        ///   - options: Options to apply to this RPC.
        ///   - handleResponse: A closure which handles the response, the result of which is
        ///       returned to the caller. Returning from the closure will cancel the RPC if it
        ///       hasn't already finished.
        /// - Returns: The result of `handleResponse`.
        internal func get<Result>(
            request: GRPCCore.ClientRequest<Echo_EchoRequest>,
            serializer: some GRPCCore.MessageSerializer<Echo_EchoRequest>,
            deserializer: some GRPCCore.MessageDeserializer<Echo_EchoResponse>,
            options: GRPCCore.CallOptions = .defaults,
            onResponse handleResponse: @Sendable @escaping (GRPCCore.ClientResponse<Echo_EchoResponse>) async throws -> Result = { response in
                try response.message
            }
        ) async throws -> Result where Result: Sendable {
            try await self.client.unary(
                request: request,
                descriptor: Echo_Echo.Method.Get.descriptor,
                serializer: serializer,
                deserializer: deserializer,
                options: options,
                onResponse: handleResponse
            )
        }

        /// Call the "Expand" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Splits a request into words and returns each word in a stream of messages.
        ///
        /// - Parameters:
        ///   - request: A request containing a single `Echo_EchoRequest` message.
        ///   - serializer: A serializer for `Echo_EchoRequest` messages.
        ///   - deserializer: A deserializer for `Echo_EchoResponse` messages.
        ///   - options: Options to apply to this RPC.
        ///   - handleResponse: A closure which handles the response, the result of which is
        ///       returned to the caller. Returning from the closure will cancel the RPC if it
        ///       hasn't already finished.
        /// - Returns: The result of `handleResponse`.
        internal func expand<Result>(
            request: GRPCCore.ClientRequest<Echo_EchoRequest>,
            serializer: some GRPCCore.MessageSerializer<Echo_EchoRequest>,
            deserializer: some GRPCCore.MessageDeserializer<Echo_EchoResponse>,
            options: GRPCCore.CallOptions = .defaults,
            onResponse handleResponse: @Sendable @escaping (GRPCCore.StreamingClientResponse<Echo_EchoResponse>) async throws -> Result
        ) async throws -> Result where Result: Sendable {
            try await self.client.serverStreaming(
                request: request,
                descriptor: Echo_Echo.Method.Expand.descriptor,
                serializer: serializer,
                deserializer: deserializer,
                options: options,
                onResponse: handleResponse
            )
        }

        /// Call the "Collect" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Collects a stream of messages and returns them concatenated when the caller closes.
        ///
        /// - Parameters:
        ///   - request: A streaming request producing `Echo_EchoRequest` messages.
        ///   - serializer: A serializer for `Echo_EchoRequest` messages.
        ///   - deserializer: A deserializer for `Echo_EchoResponse` messages.
        ///   - options: Options to apply to this RPC.
        ///   - handleResponse: A closure which handles the response, the result of which is
        ///       returned to the caller. Returning from the closure will cancel the RPC if it
        ///       hasn't already finished.
        /// - Returns: The result of `handleResponse`.
        internal func collect<Result>(
            request: GRPCCore.StreamingClientRequest<Echo_EchoRequest>,
            serializer: some GRPCCore.MessageSerializer<Echo_EchoRequest>,
            deserializer: some GRPCCore.MessageDeserializer<Echo_EchoResponse>,
            options: GRPCCore.CallOptions = .defaults,
            onResponse handleResponse: @Sendable @escaping (GRPCCore.ClientResponse<Echo_EchoResponse>) async throws -> Result = { response in
                try response.message
            }
        ) async throws -> Result where Result: Sendable {
            try await self.client.clientStreaming(
                request: request,
                descriptor: Echo_Echo.Method.Collect.descriptor,
                serializer: serializer,
                deserializer: deserializer,
                options: options,
                onResponse: handleResponse
            )
        }

        /// Call the "Update" method.
        ///
        /// > Source IDL Documentation:
        /// >
        /// > Streams back messages as they are received in an input stream.
        ///
        /// - Parameters:
        ///   - request: A streaming request producing `Echo_EchoRequest` messages.
        ///   - serializer: A serializer for `Echo_EchoRequest` messages.
        ///   - deserializer: A deserializer for `Echo_EchoResponse` messages.
        ///   - options: Options to apply to this RPC.
        ///   - handleResponse: A closure which handles the response, the result of which is
        ///       returned to the caller. Returning from the closure will cancel the RPC if it
        ///       hasn't already finished.
        /// - Returns: The result of `handleResponse`.
        internal func update<Result>(
            request: GRPCCore.StreamingClientRequest<Echo_EchoRequest>,
            serializer: some GRPCCore.MessageSerializer<Echo_EchoRequest>,
            deserializer: some GRPCCore.MessageDeserializer<Echo_EchoResponse>,
            options: GRPCCore.CallOptions = .defaults,
            onResponse handleResponse: @Sendable @escaping (GRPCCore.StreamingClientResponse<Echo_EchoResponse>) async throws -> Result
        ) async throws -> Result where Result: Sendable {
            try await self.client.bidirectionalStreaming(
                request: request,
                descriptor: Echo_Echo.Method.Update.descriptor,
                serializer: serializer,
                deserializer: deserializer,
                options: options,
                onResponse: handleResponse
            )
        }
    }
}

// Helpers providing default arguments to 'ClientProtocol' methods.
extension Echo_Echo.ClientProtocol {
    /// Call the "Get" method.
    ///
    /// > Source IDL Documentation:
    /// >
    /// > Immediately returns an echo of a request.
    ///
    /// - Parameters:
    ///   - request: A request containing a single `Echo_EchoRequest` message.
    ///   - options: Options to apply to this RPC.
    ///   - handleResponse: A closure which handles the response, the result of which is
    ///       returned to the caller. Returning from the closure will cancel the RPC if it
    ///       hasn't already finished.
    /// - Returns: The result of `handleResponse`.
    internal func get<Result>(
        request: GRPCCore.ClientRequest<Echo_EchoRequest>,
        options: GRPCCore.CallOptions = .defaults,
        onResponse handleResponse: @Sendable @escaping (GRPCCore.ClientResponse<Echo_EchoResponse>) async throws -> Result = { response in
            try response.message
        }
    ) async throws -> Result where Result: Sendable {
        try await self.get(
            request: request,
            serializer: GRPCProtobuf.ProtobufSerializer<Echo_EchoRequest>(),
            deserializer: GRPCProtobuf.ProtobufDeserializer<Echo_EchoResponse>(),
            options: options,
            onResponse: handleResponse
        )
    }

    /// Call the "Expand" method.
    ///
    /// > Source IDL Documentation:
    /// >
    /// > Splits a request into words and returns each word in a stream of messages.
    ///
    /// - Parameters:
    ///   - request: A request containing a single `Echo_EchoRequest` message.
    ///   - options: Options to apply to this RPC.
    ///   - handleResponse: A closure which handles the response, the result of which is
    ///       returned to the caller. Returning from the closure will cancel the RPC if it
    ///       hasn't already finished.
    /// - Returns: The result of `handleResponse`.
    internal func expand<Result>(
        request: GRPCCore.ClientRequest<Echo_EchoRequest>,
        options: GRPCCore.CallOptions = .defaults,
        onResponse handleResponse: @Sendable @escaping (GRPCCore.StreamingClientResponse<Echo_EchoResponse>) async throws -> Result
    ) async throws -> Result where Result: Sendable {
        try await self.expand(
            request: request,
            serializer: GRPCProtobuf.ProtobufSerializer<Echo_EchoRequest>(),
            deserializer: GRPCProtobuf.ProtobufDeserializer<Echo_EchoResponse>(),
            options: options,
            onResponse: handleResponse
        )
    }

    /// Call the "Collect" method.
    ///
    /// > Source IDL Documentation:
    /// >
    /// > Collects a stream of messages and returns them concatenated when the caller closes.
    ///
    /// - Parameters:
    ///   - request: A streaming request producing `Echo_EchoRequest` messages.
    ///   - options: Options to apply to this RPC.
    ///   - handleResponse: A closure which handles the response, the result of which is
    ///       returned to the caller. Returning from the closure will cancel the RPC if it
    ///       hasn't already finished.
    /// - Returns: The result of `handleResponse`.
    internal func collect<Result>(
        request: GRPCCore.StreamingClientRequest<Echo_EchoRequest>,
        options: GRPCCore.CallOptions = .defaults,
        onResponse handleResponse: @Sendable @escaping (GRPCCore.ClientResponse<Echo_EchoResponse>) async throws -> Result = { response in
            try response.message
        }
    ) async throws -> Result where Result: Sendable {
        try await self.collect(
            request: request,
            serializer: GRPCProtobuf.ProtobufSerializer<Echo_EchoRequest>(),
            deserializer: GRPCProtobuf.ProtobufDeserializer<Echo_EchoResponse>(),
            options: options,
            onResponse: handleResponse
        )
    }

    /// Call the "Update" method.
    ///
    /// > Source IDL Documentation:
    /// >
    /// > Streams back messages as they are received in an input stream.
    ///
    /// - Parameters:
    ///   - request: A streaming request producing `Echo_EchoRequest` messages.
    ///   - options: Options to apply to this RPC.
    ///   - handleResponse: A closure which handles the response, the result of which is
    ///       returned to the caller. Returning from the closure will cancel the RPC if it
    ///       hasn't already finished.
    /// - Returns: The result of `handleResponse`.
    internal func update<Result>(
        request: GRPCCore.StreamingClientRequest<Echo_EchoRequest>,
        options: GRPCCore.CallOptions = .defaults,
        onResponse handleResponse: @Sendable @escaping (GRPCCore.StreamingClientResponse<Echo_EchoResponse>) async throws -> Result
    ) async throws -> Result where Result: Sendable {
        try await self.update(
            request: request,
            serializer: GRPCProtobuf.ProtobufSerializer<Echo_EchoRequest>(),
            deserializer: GRPCProtobuf.ProtobufDeserializer<Echo_EchoResponse>(),
            options: options,
            onResponse: handleResponse
        )
    }
}

// Helpers providing sugared APIs for 'ClientProtocol' methods.
extension Echo_Echo.ClientProtocol {
    /// Call the "Get" method.
    ///
    /// > Source IDL Documentation:
    /// >
    /// > Immediately returns an echo of a request.
    ///
    /// - Parameters:
    ///   - message: request message to send.
    ///   - metadata: Additional metadata to send, defaults to empty.
    ///   - options: Options to apply to this RPC, defaults to `.defaults`.
    ///   - handleResponse: A closure which handles the response, the result of which is
    ///       returned to the caller. Returning from the closure will cancel the RPC if it
    ///       hasn't already finished.
    /// - Returns: The result of `handleResponse`.
    internal func get<Result>(
        _ message: Echo_EchoRequest,
        metadata: GRPCCore.Metadata = [:],
        options: GRPCCore.CallOptions = .defaults,
        onResponse handleResponse: @Sendable @escaping (GRPCCore.ClientResponse<Echo_EchoResponse>) async throws -> Result = { response in
            try response.message
        }
    ) async throws -> Result where Result: Sendable {
        let request = GRPCCore.ClientRequest<Echo_EchoRequest>(
            message: message,
            metadata: metadata
        )
        return try await self.get(
            request: request,
            options: options,
            onResponse: handleResponse
        )
    }

    /// Call the "Expand" method.
    ///
    /// > Source IDL Documentation:
    /// >
    /// > Splits a request into words and returns each word in a stream of messages.
    ///
    /// - Parameters:
    ///   - message: request message to send.
    ///   - metadata: Additional metadata to send, defaults to empty.
    ///   - options: Options to apply to this RPC, defaults to `.defaults`.
    ///   - handleResponse: A closure which handles the response, the result of which is
    ///       returned to the caller. Returning from the closure will cancel the RPC if it
    ///       hasn't already finished.
    /// - Returns: The result of `handleResponse`.
    internal func expand<Result>(
        _ message: Echo_EchoRequest,
        metadata: GRPCCore.Metadata = [:],
        options: GRPCCore.CallOptions = .defaults,
        onResponse handleResponse: @Sendable @escaping (GRPCCore.StreamingClientResponse<Echo_EchoResponse>) async throws -> Result
    ) async throws -> Result where Result: Sendable {
        let request = GRPCCore.ClientRequest<Echo_EchoRequest>(
            message: message,
            metadata: metadata
        )
        return try await self.expand(
            request: request,
            options: options,
            onResponse: handleResponse
        )
    }

    /// Call the "Collect" method.
    ///
    /// > Source IDL Documentation:
    /// >
    /// > Collects a stream of messages and returns them concatenated when the caller closes.
    ///
    /// - Parameters:
    ///   - metadata: Additional metadata to send, defaults to empty.
    ///   - options: Options to apply to this RPC, defaults to `.defaults`.
    ///   - producer: A closure producing request messages to send to the server. The request
    ///       stream is closed when the closure returns.
    ///   - handleResponse: A closure which handles the response, the result of which is
    ///       returned to the caller. Returning from the closure will cancel the RPC if it
    ///       hasn't already finished.
    /// - Returns: The result of `handleResponse`.
    internal func collect<Result>(
        metadata: GRPCCore.Metadata = [:],
        options: GRPCCore.CallOptions = .defaults,
        requestProducer producer: @Sendable @escaping (GRPCCore.RPCWriter<Echo_EchoRequest>) async throws -> Void,
        onResponse handleResponse: @Sendable @escaping (GRPCCore.ClientResponse<Echo_EchoResponse>) async throws -> Result = { response in
            try response.message
        }
    ) async throws -> Result where Result: Sendable {
        let request = GRPCCore.StreamingClientRequest<Echo_EchoRequest>(
            metadata: metadata,
            producer: producer
        )
        return try await self.collect(
            request: request,
            options: options,
            onResponse: handleResponse
        )
    }

    /// Call the "Update" method.
    ///
    /// > Source IDL Documentation:
    /// >
    /// > Streams back messages as they are received in an input stream.
    ///
    /// - Parameters:
    ///   - metadata: Additional metadata to send, defaults to empty.
    ///   - options: Options to apply to this RPC, defaults to `.defaults`.
    ///   - producer: A closure producing request messages to send to the server. The request
    ///       stream is closed when the closure returns.
    ///   - handleResponse: A closure which handles the response, the result of which is
    ///       returned to the caller. Returning from the closure will cancel the RPC if it
    ///       hasn't already finished.
    /// - Returns: The result of `handleResponse`.
    internal func update<Result>(
        metadata: GRPCCore.Metadata = [:],
        options: GRPCCore.CallOptions = .defaults,
        requestProducer producer: @Sendable @escaping (GRPCCore.RPCWriter<Echo_EchoRequest>) async throws -> Void,
        onResponse handleResponse: @Sendable @escaping (GRPCCore.StreamingClientResponse<Echo_EchoResponse>) async throws -> Result
    ) async throws -> Result where Result: Sendable {
        let request = GRPCCore.StreamingClientRequest<Echo_EchoRequest>(
            metadata: metadata,
            producer: producer
        )
        return try await self.update(
            request: request,
            options: options,
            onResponse: handleResponse
        )
    }
}