code: def sample_notebook_v4_99():
      nb = new_notebook_v4(cells=[new_markdown_cell("Hi")])
      nb["nbformat_minor"] = 99
      return nb
  
file_path: jupytext/tests/functional/others/test_nbformat_version.py
imports: import pytest
  from nbformat import writes
  from nbformat.v3.nbbase import new_code_cell, new_notebook, new_text_cell, new_worksheet
  from nbformat.v4.nbbase import new_markdown_cell
  from nbformat.v4.nbbase import new_notebook
  from jupytext import reads, writes
  from jupytext.jupytext import NotSupportedNBFormatVersion
label_desc: Use image node_id 3 for calling a global function with example usage: sample_notebook_v4_99() and returns: nb