code: def test_list_pretrained_roberta():
      assert len(list_pretrained_roberta()) > 0
  
file_path: gluon-nlp/tests/test_models_roberta.py
imports: import pytest
  import numpy
  import mxnet
  import tempfile
  from numpy.testing import assert_allclose
  from gluonnlp.models.roberta import RobertaModel, RobertaForMLM, list_pretrained_roberta, get_pretrained_roberta
  from gluonnlp.loss import LabelSmoothCrossEntropyLoss
  from gluonnlp.utils.testing import verify_backbone_fp16
label_desc: Use image node_id 1 for calling a global function with example usage: test_list_pretrained_roberta() without return types