code: def _prefetch(
      input_dataset, buffer_size, name=None
  ):  # pylint: disable=unused-private-name
      """See `Dataset.prefetch()` for details."""
      if debug_mode.DEBUG_MODE:
          return input_dataset
      return _PrefetchDataset(input_dataset, buffer_size, name=name)
  
file_path: tensorflow-upstream/tensorflow/python/data/ops/prefetch_op.py
imports: from tensorflow.python.data.ops import dataset_ops
  from tensorflow.python.data.ops import debug_mode
  from tensorflow.python.framework import dtypes
  from tensorflow.python.framework import ops
  from tensorflow.python.ops import gen_dataset_ops
label_desc: Use image node_id 1 for calling a global function with example usage: _prefetch(input_dataset, buffer_size, name) and returns: _PrefetchDataset, input_dataset