class_docstr: Visitor that translates the operation graph.
  
  The original graph is defined by the user in the preprocessing_fn.  The
  translated graph represents a Beam pipeline.
code: def __init__(self):
      self.phase = None
      self.extracted_values_dict = None
      self.intermediate_output_signature = {}
  
imports: import collections
  import dataclasses
  import hashlib
  from typing import Collection, Dict, Mapping, Optional, Tuple
  from typing import OrderedDict
  import tensorflow
  from tensorflow_transform import analyzer_nodes
  from tensorflow_transform import common_types
  from tensorflow_transform import graph_tools
  from tensorflow_transform import impl_helper
  from tensorflow_transform import nodes
  from tensorflow_transform import tf2_utils
  from tensorflow_transform import tf_utils
  from tensorflow_transform.beam import analyzer_cache
  from tensorflow_transform.beam import beam_nodes
  from tensorflow_transform.beam import combiner_packing_util
label_desc: Use image node_id 1 to create a new _TranslateVisitor object from inherited base classes: nodes with example: obj = _TranslateVisitor()