onLoadingFinished(event) {
    const data = event.params;
    const request = this._findRealRequestAndSetSession(
      data.requestId, event.targetType, event.sessionId);
    if (!request) return;
    log.verbose('network', `${request.url} loading finished`);
    request.onLoadingFinished(data);
    this.onRequestFinished(request);
  }
@param {{params: LH.Crdp.Network.LoadingFinishedEvent, targetType: LH.Protocol.TargetType, sessionId?: string}} event