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Methods are: - void add(E) - void addAll(Iterable<E>) - void remove(Object) - void removeAll(Iterable) - void retainAll(Iterable) - void removeMatching(bool test(E)) - void retainMatching(bool test(E)) They have been implemented for List and Set only. Default implementations of removeX methods in Collections assume an efficient remove method, which Lists won't have. Review URL: https://codereview.chromium.org//11931034 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@17257 260f80e4-7a28-3924-810f-c04153c831b5