Method drainText_

src/polyfills/fetch.js:152–156

* Drains the response and returns the text. * @return {!Promise } * @private

()

   * @private
   */
  drainText_() {
    devAssert(!this.bodyUsed, 'Body already used');
    this.bodyUsed = true;
    return Promise.resolve(this.xhr_.responseText);
  }

  /**
   * Drains the response and returns a promise that resolves with the response