(self)
Returns True if the current arc is the last outgoing arc from the
        previous node.
Returns True if the current arc is the last outgoing arc from the
        previous node.
Returns True if the current arc is the last outgoing arc from the previous node .
def at_last_arc(self):
        """Returns True if the current arc is the last outgoing arc from the
        previous node.
        """

        raise NotImplementedError
def at_last_arc ( self ) : raise NotImplementedError