Method waitForExtension

src/service/extensions-impl.js:192–205

* Waits for the previously included extension to complete * loading/registration. * @param {string} extensionId * @param {string} version * @return {!Promise<?ExtensionDef>}

(extensionId, version)

   * @return {!Promise<?ExtensionDef>}
   */
  waitForExtension(extensionId, version) {
    const wait = this.waitFor_(this.getExtensionHolder_(extensionId, version));

    return Services.timerFor(this.win)
      .timeoutPromise(16000, wait)
      .catch((err) => {
        if (!err.message.includes('timeout')) {
          throw err;
        }

        user().error(TAG, `Waited over 16s to load extension ${extensionId}.`);
        return wait;
      });
  }

  /**
   * Returns the promise that will be resolved when the extension has been