code: def define_graph(self):
      inputs = fn.external_source(
          source=self.bbox_source,
          num_outputs=self.bbox_source.num_outputs,
      )
      outputs = self.bbox_crop(*inputs)
      return [inputs[0], *outputs]
  
imports: from nvidia.dali.pipeline import Pipeline
  from nvidia.dali import pipeline_def
  import nvidia.dali.ops
  import nvidia.dali.fn
  import nvidia.dali.types
  import numpy
  import random
label_desc: Use image node_id 2 for calling the RandomBBoxCropSynthDataPipeline obj's underlying member method code with example usage: obj.define_graph() and returns: list