code: def test_add_union_adapter(self):
      model = self.get_model()
      model.eval()
  
      for adapter_config, filter_keys in self.adapter_configs_to_test:
          with self.subTest(
              model_class=model.__class__.__name__,
              config=adapter_config.__class__.__name__,
          ):
              self.run_add_test(model, adapter_config, filter_keys)
  
imports: from adapters.configuration import CompacterConfig, ConfigUnion, LoRAConfig, ParBnConfig, PrefixTuningConfig, SeqBnConfig
  from tests.methods.base import AdapterMethodBaseTestMixin
  from transformers.testing_utils import require_torch
label_desc: Use image node_id 1 for calling the ConfigUnionAdapterTest obj's underlying member method code with example usage: obj.test_add_union_adapter() without return types