def on_cmd(self, node_address, command, value=None, uom=None,
               request_id=None, **kwargs):
        # pylint: disable=no-self-use
        return False
:returns: JSON-ed metadata for the role
dataset/ETHPy150Open UniversalDevicesInc/Polyglot/polyglot/nodeserver_api.py/NodeServer.on_cmd--crossover with--dataset/ETHPy150Open openstack/fuel-web/nailgun/nailgun/api/v1/handlers/role.py/ClusterRolesHandler.GET