code: def test_negative_sample_key_is_in_config(vocab, entity_types):
      actions = BiluoPushDown.get_actions(entity_types=entity_types)
      tsys = BiluoPushDown(
          vocab.strings, actions, incorrect_spans_key="non_entities"
      )
      assert tsys.cfg["neg_key"] == "non_entities"
  
imports: import logging
  import random
  import pytest
  from numpy.testing import assert_equal
  from spacy import registry, util
  from spacy.attrs import ENT_IOB
  from spacy.lang.en import English
  from spacy.lang.it import Italian
  from spacy.language import Language
  from spacy.lookups import Lookups
  from spacy.pipeline import EntityRecognizer
  from spacy.pipeline._parser_internals.ner import BiluoPushDown
  from spacy.pipeline.ner import DEFAULT_NER_MODEL
  from spacy.tokens import Doc, Span
  from spacy.training import Example, iob_to_biluo, split_bilu_label
  from spacy.vocab import Vocab
  from ..util import make_tempdir
label_desc: Use image node_id 19 for calling a global function with example usage: test_negative_sample_key_is_in_config(vocab, entity_types) without return types