code: def __init__(self, size=10):
      self.size = size
  
imports: from __future__ import print_function
  from __future__ import division
  import mxnet
  import numpy
  import gluoncv
  from gluoncv.data.batchify import *
  from gluoncv.data import DetectionDataLoader, RandomTransformDataLoader
label_desc: Use image node_id 1 to create a new DummyDetectionDataset object from inherited base classes: mx.gluon.data with example: obj = DummyDetectionDataset(size)