class_docstr: Internal, not intended for use outside of this module.
  Class name becomes o['type'], and all non reserved_fields become JSON-typed key
code: def validate(self) -> None:
      pass
  
file_path: pygraphistry/graphistry/compute/ASTSerializable.py
imports: from abc import ABC, abstractmethod
  from typing import Dict
  import pandas
  from graphistry.utils.json import JSONVal, serialize_to_json_val
label_desc: Use image node_id 1 for calling the ASTSerializable obj's underlying member method code with example usage: obj.validate() without return types