code: def round_trip_cell_metadata(cell_metadata):
      nb = new_notebook(
          metadata={"jupytext": {"main_language": "python"}},
          cells=[new_code_cell("1 + 1", metadata=cell_metadata)],
      )
      text = jupytext.writes(nb, "Rmd")
      nb2 = jupytext.reads(text, "Rmd")
      compare_notebooks(nb2, nb)
  
imports: import re
  from time import sleep
  import nbformat
  import pytest
  from nbformat.v4.nbbase import new_code_cell, new_markdown_cell, new_notebook, new_raw_cell
  import jupytext
  from jupytext.cli import jupytext
  from jupytext.compare import compare, compare_cells, compare_notebooks
label_desc: Use image node_id 5 for calling a global function with example usage: round_trip_cell_metadata(cell_metadata) without return types