def signal_severance(self):
        """Signal severance of segment to node.

        Used to make the node aware of severance, so
        measures can be taken, if needed.
        """
        try: method = self.node.signal_severance
        except AttributeError:
            pass
        else:
            method(self)
Signal severance of segment to node.

        Used to make the node aware of severance, so
        measures can be taken, if needed.
        
nodezator/graphman/socket/output.py