Fix signatures of isValidKey arguments to CanonicalizedMap constructors.

lib/src/canonicalized_map.dart

 // 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.
 
 library dart.pkg.collection.canonicalized_map;
 
 import 'dart:collection';
 
 import 'utils.dart';
 
@@ skipping 17 matching lines @@
   /**
    * Creates an empty canonicalized map.
    *
    * The [canonicalize] function should return the canonical value for the given
    * key. Keys with the same canonical value are considered equivalent.
    *
    * The [isValidKey] function is called before calling [canonicalize] for
    * methods that take arbitrary objects. It can be used to filter out keys that
    * can't be canonicalized.
    */
-  CanonicalizedMap(C canonicalize(K key), {bool isValidKey(K key)})
+  CanonicalizedMap(C canonicalize(K key), {bool isValidKey(Object key)})
       : _canonicalize = canonicalize,
         _isValidKeyFn = isValidKey;
 
   /**
    * Creates a canonicalized map that is initialized with the key/value pairs of
    * [other].
    *
    * The [canonicalize] function should return the canonical value for the given
    * key. Keys with the same canonical value are considered equivalent.
    *
    * The [isValidKey] function is called before calling [canonicalize] for
    * methods that take arbitrary objects. It can be used to filter out keys that
    * can't be canonicalized.
    */
   CanonicalizedMap.from(Map<K, V> other, C canonicalize(K key),
-          {bool isValidKey(K key)})
+                        {bool isValidKey(Object key)})
       : _canonicalize = canonicalize,
         _isValidKeyFn = isValidKey {
     addAll(other);
   }
 
   V operator [](Object key) {
     if (!_isValidKey(key)) return null;
     var pair = _base[_canonicalize(key)];
     return pair == null ? null : pair.last;
   }
@@ skipping 41 matching lines @@
     return pair == null ? null : pair.last;
   }
 
   Iterable<V> get values => _base.values.map((pair) => pair.last);
 
   String toString() => Maps.mapToString(this);
 
   bool _isValidKey(Object key) => (key == null || key is K) &&
       (_isValidKeyFn == null || _isValidKeyFn(key));
 }