HelperManager { public C getConnector() { return connector; } HelperManager(C connector); C getConnector(); boolean hasHelper(String name); Helper<C> getHelper(String name); @SuppressWarnings("unchecked") H getHelper(String name, Class<H> cls); void filters(String name, Helper<C> helper); CollectionBuilderHelper getCollectionBuilderHelper(); void setCollectionBuilderHelper(CollectionBuilderHelper<C> helper); MapBuilderHelper getMapBuilderHelper(); void setMapBuilderHelper(MapBuilderHelper<C> helper); void setHelper(String name, Helper<C> helper);  }
@Test void getConnector() { assertEquals(this.connector, this.manager.getConnector()); }