class_docstr: BeamSearchDecoderMixin contains the common methods for
  BeamSearchDecoder.
  
  It is expected to be used a base class for concrete
  BeamSearchDecoder. Since this is a mixin class, it is expected to be
  used together with other class as base.
docstr: The BeamSearchDecoder shuffles its beams and their finished state.
  
  For this reason, it conflicts with the `dynamic_decode` function's
  tracking of finished states.  Setting this property to true avoids
  early stopping of decoding due to mismanagement of the finished state
  in `dynamic_decode`.
  
  Returns:
    `True`.
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code: def tracks_own_finished(self):
      """The BeamSearchDecoder shuffles its beams and their finished state.
  
      For this reason, it conflicts with the `dynamic_decode` function's
      tracking of finished states.  Setting this property to true avoids
      early stopping of decoding due to mismanagement of the finished state
      in `dynamic_decode`.
  
      Returns:
        `True`.
      """
      return True
  
imports: import collections
  import numpy
  import tensorflow
  from tensorflow_addons import options
  from tensorflow_addons.seq2seq import attention_wrapper
  from tensorflow_addons.seq2seq import decoder
  from tensorflow_addons.utils import keras_utils
  from tensorflow_addons.utils.resource_loader import LazySO
  from tensorflow_addons.utils.types import FloatTensorLike, TensorLike, Number
  from typeguard import typechecked
  from typing import Callable, Optional
label_desc: Use image node_id 4 for calling the BeamSearchDecoderMixin obj's underlying member method code with example usage: obj.tracks_own_finished() and returns: True