'Finds a volume group given the group.
:param array: the array serial number
:param group: the group object
:returns: volume group dictionary'

def _find_volume_group(self, array, group):

    group_name = self.utils.update_volume_group_name(group)
    volume_group = self.rest.get_storage_group_rep(array, group_name)
    if (not volume_group):
        LOG.warning('Volume    group    %(group_id)s    cannot    be    found', {'group_id': group_name})
        return None
    return volume_group
