def METHOD_NAME(self):
    cmd = ui.Subcommand('metasync',
                        help='update metadata from music player libraries')
    cmd.parser.add_option('-p', '--pretend', action='store_true',
                          help='show all changes but do nothing')
    cmd.parser.add_option('-s', '--source', default=[],
                          action='append', dest='sources',
                          help='comma-separated list of sources to sync')
    cmd.parser.add_format_option()
    cmd.func = self.func
    return [cmd]