Add methods to Collection.

sdk/lib/core/list.dart

 // Copyright (c) 2012, 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.
 
 part of dart.core;
 
 /**
  * A [List] is an indexable collection with a length. It can be of
  * fixed size or extendable.
  */
@@ skipping 286 matching lines @@
   void addLast(E value) {
     throw new UnsupportedError(
         "Cannot add to an unmodifiable list");
   }
 
   void addAll(Iterable<E> iterable) {
     throw new UnsupportedError(
         "Cannot add to an unmodifiable list");
   }
 
+  void remove(E element) {
+    throw new UnsupportedError(
+        "Cannot remove from an unmodifiable list");
+  }
+
+  void removeAll(Iterable elements) {
+    throw new UnsupportedError(
+        "Cannot remove from an unmodifiable list");
+  }
+
+  void retainAll(Iterable elements) {
+    throw new UnsupportedError(
+        "Cannot remove from an unmodifiable list");
+  }
+
+  void removeMatching(bool test(E element)) {
+    throw new UnsupportedError(
+        "Cannot remove from an unmodifiable list");
+  }
+
   void sort([Comparator<E> compare]) {
     throw new UnsupportedError(
         "Cannot modify an unmodifiable list");
   }
 
   void clear() {
     throw new UnsupportedError(
         "Cannot clear an unmodifiable list");
   }
 
   E removeAt(int index) {
     throw new UnsupportedError(
-        "Cannot remove in an unmodifiable list");
+        "Cannot remove from an unmodifiable list");
   }
 
   E removeLast() {
     throw new UnsupportedError(
-        "Cannot remove in an unmodifiable list");
+        "Cannot remove from an unmodifiable list");
   }
 
   void setRange(int start, int length, List<E> from, [int startFrom]) {
     throw new UnsupportedError(
         "Cannot modify an unmodifiable list");
   }
 
   void removeRange(int start, int length) {
     throw new UnsupportedError(
-        "Cannot remove in an unmodifiable list");
+        "Cannot remove from an unmodifiable list");
   }
 
   void insertRange(int start, int length, [E initialValue]) {
     throw new UnsupportedError(
         "Cannot insert range in an unmodifiable list");
   }
 }
 
 /**
  * Iterates over a [Sequence] in growing index order.
@@ skipping 81 matching lines @@
 
   ListView<E> take(int takeCount) {
     if (takeCount is! int || takeCount < 0) {
       throw new ArgumentError(takeCount);
     }
     int newLength = takeCount;
     if (_length != null && takeCount > _length) newLength = _length;
     return new ListView(_list, _offset, newLength);
   }
 }