code: def default_feature_extractor(self):
      return (
          LayoutLMv3FeatureExtractor(apply_ocr=False)
          if is_vision_available()
          else None
      )
  
imports: import copy
  import unittest
  from transformers.models.auto import get_values
  from transformers.testing_utils import require_torch, slow, torch_device
  from transformers.utils import cached_property, is_torch_available, is_vision_available
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_common import ModelTesterMixin, floats_tensor, ids_tensor, random_attention_mask
label_desc: Use image node_id 1 for calling the LayoutLMv3ModelIntegrationTest obj's underlying member method code with example usage: obj.default_feature_extractor() and returns: unknown