code: def tested(self):
      all_ast_nodes = set()
      B = ast.AST
      for item in dir(ast):
          C = getattr(ast, item)
          if inspect.isclass(C) and issubclass(C, B):
              all_ast_nodes.add(item)
  
      return all_ast_nodes - self.nodenames
  
file_path: turicreate/src/python/turicreate/meta/asttools/tests/__init__.py
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import unittest
  import ast
  import inspect
  from ...asttools import Visitor, cmp_ast, str_ast
  from ...asttools.visitors.graph_visitor import GraphGen
label_desc: Use image node_id 3 for calling the AllTypesTested obj's underlying member method code with example usage: obj.tested() and returns: unknown