### Question:
ItemDefinitionStore { public void unIndex(final String uuid) { itemDefinitions.remove(uuid); }  ItemDefinition get(final String uuid); void index(final String uuid,
                      final ItemDefinition itemDefinition); void clear(); void unIndex(final String uuid);  }### Answer:
@Test public void testUnIndex() { store.unIndex(uuid); assertNull(store.get(uuid)); }