code: def define_graph(self):
      inputs, boxes, labels = self.input(name="Reader")
      image_gpu = self.decode_gpu(inputs)
      encoded_boxes, encoded_labels = self.box_encoder(boxes, labels)
  
      return (image_gpu, boxes, labels, encoded_boxes, encoded_labels)
  
file_path: DALI/dali/test/python/test_coco_tfrecord.py
imports: import argparse
  import os
  import nvidia.dali.ops
  import nvidia.dali.types
  from nvidia.dali.pipeline import Pipeline
  import nvidia.dali.tfrecord
  from test_detection_pipeline import coco_anchors
  from test_utils import compare_pipelines, get_dali_extra_path
label_desc: Use image node_id 2 for calling the COCODetectionPipeline obj's underlying member method code with example usage: obj.define_graph() and returns: image_gpu,  boxes,  labels,  encoded_boxes,  encoded_labels