# | Line 274 | Line 274 | public interface NavigableSet<E> extends | |
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274 | * @throws ClassCastException {@inheritDoc} | |
275 | * @throws NullPointerException {@inheritDoc} | |
276 | * @throws IllegalArgumentException {@inheritDoc} | |
277 | < | na */ |
277 | > | */ |
278 | SortedSet<E> headSet(E toElement); | |
279 | ||
280 | /** |
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