code: def define_graph(self):
      self.images = self.inputs()
      custom_dummy_out = self.custom_dummy(self.images.gpu())
      return (self.images, custom_dummy_out)
  
imports: from nvidia.dali.pipeline import Pipeline
  import nvidia.dali
  import nvidia.dali.ops
  import nvidia.dali.plugin_manager
  import unittest
  import os
  import numpy
  import tempfile
label_desc: Use image node_id 2 for calling the CustomPipeline obj's underlying member method code with example usage: obj.define_graph() and returns: self,  custom_dummy_out