class_docstr: Performs the conversion to A-normal form (ANF).
class_docstr_tok: ["Performs","the","conversion","to","A-normal","form","(","ANF",")","."]
code: def visit_List(self, node):
      node = self.generic_visit(node)
      if not isinstance(node.ctx, gast.Store):
          self._ensure_fields_in_anf(node)
      return node
  
imports: import collections
  import gast
  from tensorflow.python.autograph.pyct import gast_util
  from tensorflow.python.autograph.pyct import templates
  from tensorflow.python.autograph.pyct import transformer
label_desc: Use image node_id 49 for calling the AnfTransformer obj's underlying member method code with example usage: obj.visit_List(node) and returns: node