Method _selectStrategy

packages/common/src/pipes/async_pipe.ts:212–224

(
    obj: Subscribable<any> | PromiseLike<any> | EventEmitter<any>,
  )

  }

  private _selectStrategy(
    obj: Subscribable<any> | PromiseLike<any> | EventEmitter<any>,
  ): SubscriptionStrategy {
    if (ɵisPromise(obj)) {
      return _promiseStrategy;
    }

    if (ɵisSubscribable(obj)) {
      return _subscribableStrategy;
    }

    throw invalidPipeArgumentError(AsyncPipe, obj);
  }

  private _dispose(): void {
    // Note: `dispose` is only called if a subscription has been initialized before, indicating