startNextRequestFromQueue_() {
    if (this.queuedRequests_.length > 0 &&
        this.numPendingRequests_ < this.maxRequests_) {
      const request = this.queuedRequests_.shift();
      this.startRequest_(request);
    }
  }
/**
   * Starts a request from the request queue if there is room for an additional
   * pending request.
   * @private
   */
Starts a request from the request queue if there is room for an additional
pending request.
@private
Starts a request from the request queue if there is room for an additional pending request . @private
startNextRequestFromQueue_() {
    if (this.queuedRequests_.length > 0 &&
        this.numPendingRequests_ < this.maxRequests_) {
      const request = this.queuedRequests_.shift();
      this.startRequest_(request);
    }
  }
startNextRequestFromQueue_ ( ) { if ( this . queuedRequests_ . length > 0 && this . numPendingRequests_ < this . maxRequests_ ) { const request = this . queuedRequests_ . shift ( ) ; this . startRequest_ ( request ) ; } }
Starts a request from the request queue if there is room for an additional
 pending request.
Starts a request from the request queue if there is room for an additional pending request .