code: def large_sample_cb(sample_info):
      return np.full(
          (512, 1024, 1024), sample_info.idx_in_epoch, dtype=np.int32
      )
  
imports: import numpy
  from nose.tools import with_setup
  from nvidia.dali import pipeline_def
  import nvidia.dali.fn
  from test_external_source_parallel_utils import setup_function, teardown_function, capture_processes
label_desc: Use image node_id 1 for calling a global function with example usage: large_sample_cb(sample_info) and returns: np