Class BaseObserver

packages/core/src/__tests__/unit/lifecycle.unit.ts:168–170

    it('returns true for class extending LifeCycleObserver', () => {
      class BaseObserver implements LifeCycleObserver {
        async start() {}
      }
      class DerivedObserver extends BaseObserver {}
      expect(isLifeCycleObserverClass(DerivedObserver)).to.be.true();
    });