code: def test_model_unbiased_toxic_roberta():
      model = unbiased_toxic_roberta()
      assert isinstance(model, RobertaForSequenceClassification)
  
file_path: detoxify/tests/test_models.py
imports: from detoxify.detoxify import Detoxify, multilingual_toxic_xlm_r, toxic_albert, toxic_bert, unbiased_albert, unbiased_toxic_roberta
  from transformers import AlbertForSequenceClassification, BertForSequenceClassification, RobertaForSequenceClassification, XLMRobertaForSequenceClassification
label_desc: Use image node_id 3 for calling a global function with example usage: test_model_unbiased_toxic_roberta() without return types