text: // @flow
  
  import JitsiStreamPresenterEffect from './JitsiStreamPresenterEffect';
  
  /**
   * Creates a new instance of JitsiStreamPresenterEffect.
   *
   * @param {MediaStream} stream - The video stream which will be used for
   * creating the presenter effect.
   * @returns {Promise<JitsiStreamPresenterEffect>}
   */
  export function createPresenterEffect(stream: MediaStream) {
      if (!MediaStreamTrack.prototype.getSettings
          && !MediaStreamTrack.prototype.getConstraints) {
          return Promise.reject(new Error('JitsiStreamPresenterEffect not supported!'));
      }
  
      return Promise.resolve(new JitsiStreamPresenterEffect(stream));
  }
  