  
  @pytest.mark.parametrize("dummy", [None], ids=[get_backend().upper()])
  def test_adabelief(dummy):  # pylint:disable=unused-argument
      """ Test for custom Adam optimizer """
      _test_optimizer(optimizers.AdaBelief(), target=0.45)
 
</s> remove         for mod in _get_all_sub_models(model):
 </s> add         for mod in get_all_sub_models(model):
    _test_optimizer(optimizers.AdaBelief(), target=0.20)
  
  @pytest.mark.parametrize("dummy", [None], ids=[get_backend().upper()])
  def test_adabelief(dummy):  # pylint:disable=unused-argument
      """ Test for custom Adam optimizer """
    _test_optimizer(optimizers.AdaBelief(), target=0.20)
keep keep keep keep replace
 Refactoring and TravisCI to Github Actions (#1239)

* refactor training

* travis to actions 
tests/lib/model/optimizers_test.py