code: def default_feature_extractor(self):
      return (
          DeiTFeatureExtractor.from_pretrained(
              "facebook/deit-base-distilled-patch16-224"
          )
          if is_vision_available()
          else None
      )
  
imports: import inspect
  import unittest
  import numpy
  from transformers import DeiTConfig
  from transformers.testing_utils import require_tf, require_vision, slow
  from transformers.utils import cached_property, is_tf_available, is_vision_available
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_tf_common import TFModelTesterMixin, floats_tensor, ids_tensor
label_desc: Use image node_id 1 for calling the DeiTModelIntegrationTest obj's underlying member method code with example usage: obj.default_feature_extractor() and returns: unknown