src/core_plugins/ems_util/common/ems_client.js
/**
   * this internal method is overridden by the tests to simulate custom manifest.
   */
this internal method is overridden by the tests to simulate custom manifest.
this internal method is overridden by the tests to simulate custom manifest .
async _getManifest(manifestUrl) {
    const url = extendUrl(manifestUrl, { query: this._queryParams });
    const result = await fetch(url);
    return await result.json();
  }
async _getManifest ( manifestUrl ) { const url = extendUrl ( manifestUrl , { query : this . _queryParams } ) ; const result = await fetch ( url ) ; return await result . json ( ) ; }
this internal method is overridden by the tests to simulate custom manifest.
this internal method is overridden by the tests to simulate custom manifest .