stop() {
    // TODO:
    // For SS DAI streams, if a different asset gets unloaded as
    // part of the process
    // of loading a DAI asset, stream manager state gets reset and we
    // don't get any ad events.
    // We need to figure out if it makes sense to stop the SS
    // manager on unload, and, if it does, find
    // a way to do it safely.
    // this.streamManager_.reset();
    this.backupUrl_ = '';
    this.snapForwardTime_ = null;
    this.currentCuePoints_ = [];
  }
Resets the stream manager and removes any continuous polling.