code: def __init__(self, group, pipeline, data, batch_size):
      self._group = group
      self._pipepline = pipeline
      self._data = data
      self._batch_size = batch_size
  
imports: from nvidia.dali import backend
  from nvidia.dali import tensors
  from nvidia.dali import types
  from nvidia.dali._multiproc.messages import TaskArgs, SampleRange
  import nvidia.dali.types
  from nvidia.dali._utils.external_source_impl import get_callback_from_source, accepted_arg_count, SourceKind
label_desc: Use image node_id 1 to create a new _ExternalDataBatch object  with example: obj = _ExternalDataBatch(group, pipeline, data, batch_size)