code: def __call__(self):
      # Testing aggregated Adam update for one element
      self.run_test(1, aggregate=True)
      # Testing Adam update, if num_elem == 0, OR
      #         aggregated Adam update, if num_elem > 0
      for num_elem in reversed(range(6)):
          self.run_test(num_elem + 1)
  
file_path: mxnet/tests/python/unittest/test_contrib_optimizer.py
imports: import itertools
  import numpy
  import mxnet
  from mxnet.test_utils import *
  import pytest
  from common import xfail_when_nonstandard_decimal_separator
label_desc: Use image node_id 3 for calling the _AdamLikeTestHelper obj's underlying member method code with example usage: obj.__call__() without return types