class_docstr: Step-by-step decoder with LM fusion.
class_docstr_tok: ["Step-by-step","decoder","with","LM","fusion","."]
code: def _PostBeamSearchStepCallback(
      self, theta, encoder_outputs, new_step_ids, states
  ):
      del encoder_outputs, new_step_ids
      return states
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import math
  import lingvo.compat
  from lingvo.core import attention
  from lingvo.core import base_decoder
  from lingvo.core import base_layer
  from lingvo.core import cluster_factory
  from lingvo.core import layers
  from lingvo.core import plot
  from lingvo.core import py_utils
  from lingvo.core import recurrent
  from lingvo.core import rnn_cell
  from lingvo.core import summary_utils
  from lingvo.core import symbolic
  from lingvo.tasks.asr import contextualizer_base
  from lingvo.tasks.asr import decoder_utils
  from lingvo.tasks.asr import fusion
  from matplotlib import font_manager
  import six
  from six.moves import range
label_desc: Use image node_id 9 for calling the AsrDecoder obj's underlying member method code with example usage: obj._PostBeamSearchStepCallback(theta, encoder_outputs, new_step_ids, states) and returns: states