code: def main():
      """Create symlink in sys.prefix based on name of extension"""
  
      labexts = jupyterlab_jupytext._jupyter_labextension_paths()
      base_path = os.path.join(
          os.path.dirname(os.path.dirname(os.path.abspath(__file__))),
          "jupyterlab_jupytext",
      )
  
      for labext in labexts:
          src = os.path.join(base_path, labext["src"])
          dest = labext["dest"]
          print(f"Installing {src} -> {dest}")
  
          if not os.path.exists(src):
              build_labextension(base_path)
  
          full_dest = develop_labextension(
              src,
              overwrite=True,
              symlink=True,
              user=False,
              sys_prefix=True,
              labextensions_dir="",
              destination=dest,
          )
          print(f"Creating symlink at {full_dest}")
  
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types