'GET /api/groups/{encoded_group_id}
Return a dictionary of information about a group.
:param id: the encoded id of the Group object
Example: GET localhost:9009/api/groups/f9cad7b01a472135'

@expose_api_anonymous_and_sessionless
def show(self, trans, encoded_id, **kwd):

    decoded_id = trans.security.decode_id(encoded_id)
    group = self.group_manager.get(trans, decoded_id)
    if (group is None):
        raise ObjectNotFound(('Unable    to    locate    group    record    for    id    %s.' % str(encoded_id)))
    return self._populate(trans, group)
