Class SystemA

packages/core/tests/ECS/EntitySystemDI.test.ts:119–126

        test('应该支持多层级依赖注入', () => {
            @Injectable()
            @ECSSystem('A')
            class SystemA extends EntitySystem implements IService {
                constructor() {
                    super(Matcher.empty());
                }
                override dispose() {}
            }

            @Injectable()
            @ECSSystem('B')