code: def test_model_main_input_name(self):
      for model_class in self.all_model_classes:
          model_signature = inspect.signature(
              getattr(model_class, "forward")
          )
          # The main input is the name of the argument after `self`
          observed_main_input_name = list(
              model_signature.parameters.keys()
          )[1:3]
          self.assertEqual(
              model_class.main_input_name, observed_main_input_name
          )
  
imports: import copy
  import inspect
  import unittest
  import numpy
  from tests.test_modeling_common import floats_tensor
  from transformers import OneFormerConfig, is_torch_available, is_vision_available
  from transformers.testing_utils import require_torch, require_torch_accelerator, require_torch_fp16, require_torch_multi_gpu, require_vision, slow, torch_device
  from transformers.utils import cached_property
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 6 for calling the OneFormerModelTest obj's underlying member method code with example usage: obj.test_model_main_input_name() without return types