(self, node: NodeType)
Get successors of a node. The node should be in the graph.

        :param node: The node to work with.
        :return:     A list of successors.
        :rtype:      list
Get successors of a node. The node should be in the graph.
Get successors of a node . The node should be in the graph .
def successors(self, node: NodeType) -> List[NodeType]:
        """
        Get successors of a node. The node should be in the graph.

        :param node: The node to work with.
        :return:     A list of successors.
        :rtype:      list
        """

        raise NotImplementedError()
def successors ( self , node : NodeType ) -> List [ NodeType ] : raise NotImplementedError ( )