code: def test_identity_write_read(rmd_file, no_jupytext_version_number):
      """Test that writing the notebook with ipynb, and read again, yields identity"""
  
      with open(rmd_file) as fp:
          rmd = fp.read()
  
      nb = jupytext.reads(rmd, "Rmd")
      rmd2 = jupytext.writes(nb, "Rmd")
  
      compare(rmd2, rmd)
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_identity_write_read(rmd_file, no_jupytext_version_number) without return types