human
Complete this python program:
def flocker_volume_options(cls):
assistant
#Here is the Python program you requested.

    """A class decorator to add ``VolumeService`` specific command line options to
    flocker commands.
    :param cls: The class to decorate.
    :return: The decorated class.
    """
    original_parameters = getattr(cls, 'optParameters', [])
    cls.optParameters = (original_parameters + [['config', None, DEFAULT_CONFIG_PATH.path, 'The    path    to    the    Flocker    volume    configuration    file,    containing    the    node    ID    of    the    Flocker    volume    service    on    this    node.    This    file    will    be    created    if    it    does    not    already    exist.'], ['pool', None, FLOCKER_POOL, 'The    ZFS    pool    to    use    for    volumes.'], ['mountpoint', None, FLOCKER_MOUNTPOINT.path, 'The    path    where    ZFS    filesystems    will    be    mounted.']])
    original_postOptions = cls.postOptions
    def postOptions(self):
        self['config'] = FilePath(self['config'])
        original_postOptions(self)
    cls.postOptions = postOptions
    return cls