### Question:
ConcurrentLongHashMap { public int removeIf(LongObjectPredicate<V> predicate) { checkNotNull(predicate); int removedCount = 0; for (Section<V> s : sections) { removedCount += s.removeIf(predicate); } return removedCount; } ConcurrentLongHashMap();  ConcurrentLongHashMap(int expectedItems);  ConcurrentLongHashMap(int expectedItems, int concurrencyLevel); long size(); long capacity(); boolean isEmpty(); V get(long key); boolean containsKey(long key); V put(long key, V value); V putIfAbsent(long key, V value); V computeIfAbsent(long key, LongFunction<V> provider); V remove(long key); boolean remove(long key, Object value); int removeIf(LongObjectPredicate<V> predicate); void clear(); void forEach(EntryProcessor<V> processor); List<Long> keys(); List<V> values();  }### Answer:
@Test public void testRemoveIf() { ConcurrentLongHashMap<String> map = new ConcurrentLongHashMap<>(16, 1); map.put(1L, "one"); map.put(2L, "two"); map.put(3L, "three"); map.put(4L, "four"); map.removeIf((k, v) -> k < 3); assertFalse(map.containsKey(1L)); assertFalse(map.containsKey(2L)); assertTrue(map.containsKey(3L)); assertTrue(map.containsKey(4L)); assertEquals(2, map.size()); }