lib/src/utils.dart - collection - Git at Google

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.

 /// Returns a [Comparator] that asserts that its first argument is comparable.
 Comparator<T> defaultCompare<T>() =>
     (value1, value2) => (value1 as Comparable).compareTo(value2);
	// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file
	// for details. All rights reserved. Use of this source code is governed by a
	// BSD-style license that can be found in the LICENSE file.

	/// Returns a [Comparator] that asserts that its first argument is comparable.
	Comparator<T> defaultCompare<T>() =>
	(value1, value2) => (value1 as Comparable).compareTo(value2);