const INPUTS_BLOCK = String.raw`<inputs>.*<\/inputs>\s*`;
const CODE_BLOCK = String.raw`<code><!\[CDATA\[[\s\S]*\]\]>\s*<\/code>\s*`;
const CELL_CLOSE = String.raw`<\/cell>`;
return "^(" + CELL_OPEN + INPUTS_BLOCK + CODE_BLOCK + CELL_CLOSE + ")*$";
}