class_docstr: This implements a *very* limited decompiler. It only handles cases of
  lambda x: fn(a, b, x, ...)
  where a,b, etc are variables captured from the surrounding scope, and there
  may be some occurrences of x.
  No additional statements or expressions are permitted
code: def visit_ClassDef(self, node):
      raise NotImplementedError("Classes are not implemented")
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import sys
  import ast
  import inspect
  from ..None import meta
label_desc: Use image node_id 13 for calling the lambda_closure_visitor obj's underlying member method code with example usage: obj.visit_ClassDef(node) without return types