docstr: Exercise a scenario that has led to segfaults in the past.
      
docstr_tok: ["Exercise","a","scenario","that","has","led","to","segfaults","in","the","past","."]
code: def testSortEmptyRepeatedCompositeContainer(self):
      """Exercise a scenario that has led to segfaults in the past."""
      m = unittest_pb2.TestAllTypes()
      m.repeated_nested_message.sort()
  
imports: import copy
  import math
  import operator
  import pickle
  import unittest
  from google.protobuf import unittest_import_pb2
  from google.protobuf import unittest_pb2
  from google.protobuf.internal import api_implementation
  from google.protobuf.internal import test_util
  from google.protobuf import message
label_desc: Use image node_id 21 for calling the MessageTest obj's underlying member method code with example usage: obj.testSortEmptyRepeatedCompositeContainer() without return types