# | Line 471 | Line 471 | public class ConcurrentSkipListSet<E> | |
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471 | * in {@link IllegalArgumentException}. Instances of this class are | |
472 | * constructed only using the <tt>subSet</tt>, <tt>headSet</tt>, and | |
473 | * <tt>tailSet</tt> methods of their underlying sets. | |
474 | – | * |
474 | */ | |
475 | static class ConcurrentSkipListSubSet<E> | |
476 | extends AbstractSet<E> |
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