code: def test_vs_separate_ops(dev, mode, roi_start, roi_end):
      pipe = rcm_pipe(dev, mode, roi_start, roi_end)
      pipe.build()
      for _ in range(5):
          rcm, separate = pipe.run()
          check_batch(rcm, separate, len(rcm), 1e-3, 1)
  
imports: import os
  from nose2.tools import params
  from nvidia.dali import fn, types, pipeline_def
  from test_utils import check_batch, get_dali_extra_path
label_desc: Use image node_id 2 for calling a global function with example usage: test_vs_separate_ops(dev, mode, roi_start, roi_end) without return types