def outputs_of(self, idx, create=False):
        """ Get a set of the outputs for a given node index.
        """
        if create and not idx in self.edges:
            self.edges[idx] = set()
        return self.edges[idx]
def outputs_of ( self , idx , create = False ) : if create and not idx in self . edges : self . edges [ idx ] = set ( ) return self . edges [ idx ]
Get a set of the outputs for a given node index.