def peek_step(self, val: ObjectValue,
                  sn: "DataNode") -> Tuple[None, "DataNode"]:
        """Fail because there is no action instance."""
        cn = sn.get_child(self.name, self.namespace)
        return (None, cn)
def peek_step ( self , val : ObjectValue , sn : "DataNode" ) -> Tuple [ None , "DataNode" ] : cn = sn . get_child ( self . name , self . namespace ) return ( None , cn )
Fail because there is no action instance.