@classmethod
def from_json(cls, json_data):
    """Build and return a new Group object from json data (used internally)"""
    return cls(group_id=json_data['grpId'], name=json_data['grpName'],
        description=json_data.get('grpDescription', ''), path=json_data[
        'grpPath'], parent_id=json_data['grpParentId'])
