code: def provide_label(self):
      return [
          mx.io.DataDesc(
              "softmax_label", (self.batch_size,), self.dtype
          )
      ]
  
file_path: DALI/docs/examples/use_cases/mxnet/resnetn/common/data.py
imports: import mxnet
  import random
  from mxnet.io import DataBatch, DataIter
  import numpy
label_desc: Use image node_id 4 for calling the SyntheticDataIter obj's underlying member method code with example usage: obj.provide_label() and returns: list