code: def visitor(self):
      return visitors.GraphNodeVisitor()
  
file_path: astmonkey/astmonkey/tests/test_visitors.py
imports: import sys
  import pytest
  import ast
  from astmonkey import visitors, transformers, utils
label_desc: Use image node_id 1 for calling the TestGraphNodeVisitor obj's underlying member method code with example usage: obj.visitor() and returns: visitors