Method constructor

packages/core/test/injector/injector.spec.ts:938–941

(
          private dep1: FixtureDep1,
          @Optional() private dep2: FixtureDep2,
        )

      @Injectable()
      class FixtureClass {
        constructor(
          private dep1: FixtureDep1,
          @Optional() private dep2: FixtureDep2,
        ) {}
      }

      const wrapper = new InstanceWrapper({ metatype: FixtureClass });