code: def test_from_datasets_with_empty_tokens(self):
      dataset_ds = datasets.Dataset.from_dict(
          {"empty_tokens": [["mock"], []]}
      )
  
      with pytest.warns(
          UserWarning, match="Ignoring row with no tokens."
      ):
          dataset_rb = DatasetForTokenClassification.from_datasets(
              dataset_ds, tokens="empty_tokens"
          )
          assert len(dataset_rb) == 1
          assert dataset_rb[0].tokens == ["mock"]
  
imports: import copy
  import os
  import sys
  from time import sleep
  import datasets
  import pandas
  import pytest
  import spacy
  from argilla.client.datasets import DatasetBase, DatasetForText2Text, DatasetForTextClassification, DatasetForTokenClassification, WrongRecordTypeError, read_datasets, read_pandas
  from argilla.client.models import Text2TextRecord, TextClassificationRecord, TokenClassificationRecord
  from argilla.datasets import TextClassificationSettings
label_desc: Use image node_id 13 for calling the TestDatasetForTokenClassification obj's underlying member method code with example usage: obj.test_from_datasets_with_empty_tokens() without return types