code: def test_two_raw_cells_are_preserved(
      nb=new_notebook(
          cells=[new_raw_cell("---\nX\n---"), new_raw_cell("Y")]
      )
  ):
      """Test the pattern described at https://github.com/mwouts/jupytext/issues/466"""
      py = jupytext.writes(nb, "py")
      nb2 = jupytext.reads(py, "py")
      compare_notebooks(nb2, nb)
  
imports: import pytest
  from nbformat.v4.nbbase import new_code_cell, new_markdown_cell, new_notebook, new_raw_cell
  import jupytext
  from jupytext.compare import compare, compare_notebooks
label_desc: Use image node_id 45 for calling a global function with example usage: test_two_raw_cells_are_preserved(nb) without return types