Class SystemB

packages/core/tests/ECS/EntitySystemDI.test.ts:128–138

            }

            @Injectable()
            @ECSSystem('B')
            class SystemB extends EntitySystem implements IService {
                @InjectProperty(SystemA)
                public systemA!: SystemA;

                constructor() {
                    super(Matcher.empty());
                }
                override dispose() {}
            }

            @Injectable()
            @ECSSystem('C')