code: def test_forward_signature(self):
      (
          config,
          _,
      ) = self.model_tester.prepare_config_and_inputs_for_common()
  
      for model_class in self.all_model_classes:
          model = model_class(config)
          signature = inspect.signature(model.__call__)
          # signature.parameters is an OrderedDict => so arg_names order is deterministic
          arg_names = [*signature.parameters.keys()]
  
          if model.config.is_encoder_decoder:
              expected_arg_names = [
                  "input_ids",
                  "attention_mask",
                  "decoder_input_ids",
                  "decoder_attention_mask",
              ]
              self.assertListEqual(
                  arg_names[: len(expected_arg_names)],
                  expected_arg_names,
              )
          else:
              expected_arg_names = ["input_ids", "attention_mask"]
              self.assertListEqual(arg_names[:2], expected_arg_names)
  
imports: import copy
  import inspect
  import json
  import random
  import tempfile
  import unittest
  from typing import List, Tuple
  import numpy
  import transformers
  from huggingface_hub import HfFolder, delete_repo, set_access_token
  from requests.exceptions import HTTPError
  from transformers import BertConfig, is_flax_available, is_torch_available
  from transformers.models.auto import get_values
  from transformers.testing_utils import TOKEN, USER, CaptureLogger, is_pt_flax_cross_test, is_staging_test, require_flax, torch_device
  from transformers.utils import logging
  from transformers.utils.generic import ModelOutput
label_desc: Use image node_id 14 for calling the FlaxModelTesterMixin obj's underlying member method code with example usage: obj.test_forward_signature() without return types