code: def is_directed(cls) -> bool:
      return True
  
file_path: cugraph/python/nx-cugraph/nx_cugraph/classes/digraph.py
imports: from __future__ import annotations
  from typing import TYPE_CHECKING
  import cupy
  import networkx
  import nx_cugraph
  from .graph import Graph
label_desc: Use image node_id 1 for calling the DiGraph obj's underlying member method code with example usage: obj.is_directed(cls) and returns: True