code: def testPacking(self):
      packed = generator_utils.pack_examples(
          example_generator(),
          has_inputs=True,
          packed_length=5,
          queue_size=2,
          spacing=0,
      )
      for example, reference in zip(
          packed, reference_packing(trim_right)
      ):
          self.assertAllEqual(
              set(example.keys()), set(reference.keys())
          )
          for k in reference:
              self.assertAllEqual(example[k], reference[k])
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import gzip
  import io
  import os
  import tempfile
  from builtins import bytes
  from tensor2tensor.data_generators import generator_utils
  import tensorflow.compat.v1
label_desc: Use image node_id 6 for calling the GeneratorUtilsTest obj's underlying member method code with example usage: obj.testPacking() without return types