code: def test_onnx_export_mxnet_to_onnx():
      assert _test_tutorial_nb("onnx/export_mxnet_to_onnx")
  
imports: import os
  import sys
  from notebook_test import run_notebook
label_desc: Use image node_id 29 for calling a global function with example usage: test_onnx_export_mxnet_to_onnx() without return types