code: def test_list_pretrained_bert():
      assert len(list_pretrained_bert()) > 0
  
file_path: gluon-nlp/tests/test_models_bert.py
imports: import pytest
  from numpy.testing import assert_allclose
  import mxnet
  import tempfile
  from gluonnlp.models.bert import BertModel, BertForMLM, BertForPretrain, list_pretrained_bert, get_pretrained_bert
  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_bert() without return types