class_docstr: Class to visit nodes in the graph.
docstr: Validate the value of a ValueNode.
  
  Should raise an error if `value` is invalid.
  
  Args:
    value: An element of the tuple returned by visit.
docstr_tok: ["Validate","the","value","of","a","ValueNode",".","Should","raise","an","error","if","`","value","`","is","invalid",".","Args",":","value",":","An","element","of","the","tuple","returned","by","visit","."]
code: def validate_value(self, value):
      """Validate the value of a ValueNode.
  
      Should raise an error if `value` is invalid.
  
      Args:
        value: An element of the tuple returned by visit.
      """
      pass
  
imports: import abc
  import collections
  import dataclasses
  from typing import Any, Collection, Dict, List, Optional, Tuple
  import pydot
label_desc: Use image node_id 1 for calling the Visitor obj's underlying member method code with example usage: obj.validate_value(value) without return types