class_docstr: CFG visitor that performs liveness analysis at statement level.
class_docstr_tok: ["CFG","visitor","that","performs","liveness","analysis","at","statement","level","."]
code: def init_state(self, _):
      return set()
  
imports: import gast
  from tensorflow.python.autograph.pyct import anno
  from tensorflow.python.autograph.pyct import cfg
  from tensorflow.python.autograph.pyct import transformer
  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: set