### Question:
MutableEntrySet extends AbstractEntrySet<K, V> { @Override public void clear() { map().clear(); } MutableEntrySet(final TrieMap<K, V> map); @Override void clear(); @Override Iterator<Entry<K, V>> iterator(); @Override @SuppressWarnings("checkstyle:parameterName") boolean remove(final Object o);  }### Answer:
@Test public void testClear() { set.clear(); assertTrue(map.isEmpty()); assertTrue(set.isEmpty()); }