class_docstr: CFG visitor that propagates type information across statements.
code: def init_state(self, _):
      return _TypeMap()
  
imports: import itertools
  from typing import Any, Callable, Dict, Set
  import gast
  from tensorflow.python.autograph.pyct import anno
  from tensorflow.python.autograph.pyct import cfg
  from tensorflow.python.autograph.pyct import qual_names
  from tensorflow.python.autograph.pyct import transformer
  from tensorflow.python.autograph.pyct.static_analysis import activity
  from tensorflow.python.autograph.pyct.static_analysis import annos
label_desc: Use image node_id 2 for calling the Analyzer obj's underlying member method code with example usage: obj.init_state(_) and returns: _TypeMap