Method nextCallback

packages/common/http/src/jsonp.ts:120–122

* Get the name of the next callback method, by incrementing the global `nextRequestId`.

()

   * Get the name of the next callback method, by incrementing the global `nextRequestId`.
   */
  private nextCallback(): string {
    return `ng_jsonp_callback_${nextRequestId++}`;
  }

  /**
   * Processes a JSONP request and returns an event stream of the results.