docs: function getFileGroup(files) {
    /**
     * Capture the group id from the first file in the files array.
     */
    const groupId = new RegExp(`^.+/([^/]+~${files.length})/nth/`).exec(files[0])[1];
  
    /**
     * The `openDialog` method handles the jQuery promise object returned by
     * `fileFrom`, but requires the promise returned by `loadFileGroup` to provide
     * the result of it's `done` method.
     */
    return new Promise(resolve => uploadcare.loadFileGroup(groupId).done(group => resolve(group)));
  }