code: def test_generate_with_headmasking(self):
      # TODO: Head-masking not yet implement
      pass
  
imports: from __future__ import annotations
  import unittest
  from transformers import LEDConfig, is_tf_available
  from transformers.testing_utils import require_tf, slow
  from ...test_configuration_common import ConfigTester
  from ...test_modeling_tf_common import TFModelTesterMixin, ids_tensor
  from ...test_pipeline_mixin import PipelineTesterMixin
label_desc: Use image node_id 6 for calling the TFLEDModelTest obj's underlying member method code with example usage: obj.test_generate_with_headmasking() without return types