def child_pointer_lists(self, edge):
        # Make a copy, in case they modify it.
        return self._edge_to_cpls.get(edge, {}).keys()

    #////////////////////////////////////////////////////////////
    # Display
    #////////////////////////////////////////////////////////////
Return the set of child pointer lists for the given edge.
dataset/ETHPy150Open nltk/nltk/nltk/parse/chart.py/Chart.child_pointer_lists