docstr: Number of hypotheses in the list.
code: def __len__(self):
      """
      Number of hypotheses in the list.
      """
      return len(self.beams)
  
imports: import inspect
  import warnings
  from dataclasses import dataclass
  from typing import Any, Dict, List, Optional, Tuple, Union
  import numpy
  import tensorflow
  from tensorflow.compiler.tf2xla.python.xla import dynamic_update_slice
  from .generation_tf_logits_process import TFForcedBOSTokenLogitsProcessor, TFForcedEOSTokenLogitsProcessor, TFForceTokensLogitsProcessor, TFLogitsProcessorList, TFMinLengthLogitsProcessor, TFNoBadWordsLogitsProcessor, TFNoRepeatNGramLogitsProcessor, TFRepetitionPenaltyLogitsProcessor, TFSuppressTokensAtBeginLogitsProcessor, TFSuppressTokensLogitsProcessor, TFTemperatureLogitsWarper, TFTopKLogitsWarper, TFTopPLogitsWarper
  from .models.auto import TF_MODEL_FOR_CAUSAL_LM_MAPPING, TF_MODEL_FOR_SEQ_TO_SEQ_CAUSAL_LM_MAPPING, TF_MODEL_FOR_SPEECH_SEQ_2_SEQ_MAPPING, TF_MODEL_FOR_VISION_2_SEQ_MAPPING
  from .tf_utils import shape_list, stable_softmax
  from .utils import ModelOutput, logging
label_desc: Use image node_id 2 for calling the BeamHypotheses obj's underlying member method code with example usage: obj.__len__() and returns: len