human
I wrote the below code

    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

What's a good function header?
assistant
#Here's a good function header.

def flocker_volume_options(cls):