### Question:
AbstractRegistryWrapper implements Registry<T> { @Override public boolean contains(final T item) { return wrapped.contains(item); } protected  AbstractRegistryWrapper(final R wrapped); @Override boolean contains(final T item); @Override boolean isEmpty();  }### Answer:
@Test @SuppressWarnings("unchecked") public void testContains() { assertTrue(tested.contains(s1)); assertTrue(tested.contains(s2)); assertFalse(tested.contains("")); }