GuavaMatchers { public static Matcher<Optional> emptyGuavaOptional() { return IsEmptyGuavaOptional.emptyGuavaOptional(); }  static Matcher<Optional> emptyGuavaOptional(); static Matcher<T> equivalentTo(final T expected, final Equivalence<T> equivalence); static Matcher<Multiset<E>> elementWithCount(final E element, final int size); static Matcher<Multimap<K, ?>> keyWithSize(final K element, final int size); static Matcher<Multimap<K, ?>> hasSameKeySet(final Multimap<K, ?> comparison); static Matcher<Multimap<K, ?>> hasSameKeySet(final Set<K> comparison); static Matcher<Multimap<K, ?>> emptyKeySet(); static Matcher<Multimap<K, ?>> keySetWithSize(final int size);  }
@Test public void testEmptyGuavaOptional() throws Exception { assertThat(GuavaMatchers.emptyGuavaOptional(), instanceOf(IsEmptyGuavaOptional.class)); }