def list_folder(drive, folder_id):
    """
    Lists contents of a GoogleDriveFile that is a folder
    :param drive: Drive object to use for getting folders
    :param folder_id: The id of the GoogleDriveFile
    :return: The GoogleDriveList of folders
    """
    _q = {'q': "'{}' in parents and trashed=false".format(folder_id)}
    return drive.ListFile(_q).GetList()