public <T> void assertContainsElements(
Collection<? extends T> collection, Collection<T> expected) {
ArrayList<T> copy = new ArrayList<T>(collection);
copy.retainAll(expected);
assertSameElements(toString(collection), copy, expected);
}
public <T> void assertContainsOrdered(
Collection<? extends T> collection, Collection<T> expected) {
ArrayList<T> copy = new ArrayList<T>(collection);
copy.retainAll(expected);
assertOrderedEquals(toString(collection), copy, expected);
}