### Question:
ExtendedComponentMapperManager extends Manager { public <T extends Component> M<T> getFor(Class<T> type) { ComponentTypeFactory tf = world.getComponentManager().getTypeFactory(); return getCreateMapper(tf.getTypeFor(type)); }  M<T> getFor(Class<T> type);  }### Answer:
@Test public void ensure_resolved_mapper_isnt_duplicated() { M<Pos> posMapperAgain = M.getFor(Pos.class, w); Assert.assertTrue(mPos == posMapperAgain); }