code: def _assert_empty(trf_data):
      assert trf_data.wordpieces.strings == []
      assert trf_data.wordpieces.input_ids.size == 0
      assert trf_data.wordpieces.attention_mask.size == 0
      assert trf_data.tensors == ()
      assert len(trf_data.align.data) == 0
  
imports: import pytest
  from packaging.version import Version
  import torch
  import spacy
  from spacy.language import Language
  from spacy.training.example import Example
  from spacy.util import make_tempdir
  from spacy.vocab import Vocab
  from spacy.tokens import Doc
  from spacy import util
  from thinc.api import Model, Config, get_current_ops, NumpyOps
  from spacy.tests.util import assert_docs_equal
  from .util import DummyTransformer, _assert_equal_tensors
  from ..None import TransformerModel
  from ..pipeline_component import Transformer
  from ..layers import TransformerListener
  from ..data_classes import TransformerData, FullTransformerBatch
label_desc: Use image node_id 15 for calling a global function with example usage: _assert_empty(trf_data) without return types