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+//
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+// SnapKit
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+//
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+// Copyright (c) 2011-Present SnapKit Team - https://github.com/SnapKit
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+//
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+// Permission is hereby granted, free of charge, to any person obtaining a copy
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+// of this software and associated documentation files (the "Software"), to deal
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+// in the Software without restriction, including without limitation the rights
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+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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+// copies of the Software, and to permit persons to whom the Software is
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+// furnished to do so, subject to the following conditions:
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+//
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+// The above copyright notice and this permission notice shall be included in
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+// all copies or substantial portions of the Software.
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+//
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+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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+// THE SOFTWARE.
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+
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+#if os(iOS) || os(tvOS)
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+ import UIKit
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+#else
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+ import AppKit
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+#endif
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+
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+
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+extension ConstraintMakerRelatable {
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+
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+ @discardableResult
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+ public func equalToSuperview<T: ConstraintRelatableTarget>(_ closure: (ConstraintView) -> T, _ file: String = #file, line: UInt = #line) -> ConstraintMakerEditable {
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+ guard let other = self.description.item.superview else {
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+ fatalError("Expected superview but found nil when attempting make constraint `equalToSuperview`.")
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+ }
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+ return self.relatedTo(closure(other), relation: .equal, file: file, line: line)
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+ }
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+
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+ @discardableResult
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+ public func lessThanOrEqualToSuperview<T: ConstraintRelatableTarget>(_ closure: (ConstraintView) -> T, _ file: String = #file, line: UInt = #line) -> ConstraintMakerEditable {
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+ guard let other = self.description.item.superview else {
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+ fatalError("Expected superview but found nil when attempting make constraint `lessThanOrEqualToSuperview`.")
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+ }
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+ return self.relatedTo(closure(other), relation: .lessThanOrEqual, file: file, line: line)
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+ }
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+
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+ @discardableResult
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+ public func greaterThanOrEqualTo<T: ConstraintRelatableTarget>(_ closure: (ConstraintView) -> T, _ file: String = #file, line: UInt = #line) -> ConstraintMakerEditable {
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+ guard let other = self.description.item.superview else {
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+ fatalError("Expected superview but found nil when attempting make constraint `greaterThanOrEqualToSuperview`.")
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+ }
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+ return self.relatedTo(closure(other), relation: .greaterThanOrEqual, file: file, line: line)
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+ }
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+
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+}
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wotjd