code: def get_config(self):
      return VitMatteConfig(
          backbone_config=self.get_backbone_config(),
          hidden_size=self.hidden_size,
          fusion_hidden_sizes=self.fusion_hidden_sizes,
      )
  
imports: import unittest
  from huggingface_hub import hf_hub_download
  from transformers import VitMatteConfig
  from transformers.testing_utils import require_torch, slow, torch_device
  from transformers.utils import is_torch_available, is_vision_available
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, floats_tensor
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 4 for calling the VitMatteModelTester obj's underlying member method code with example usage: obj.get_config() and returns: VitMatteConfig