code: function postProcess(json: string, printModule: string => string): string {
    return json.replace(
      /"@@MODULE_START@@(.*?)@@MODULE_END@@"/g,
      (_, moduleName) => printModule(moduleName),
    );
  }
docs: After JSON.stringify'ing some code that contained parts marked with `mark()`,
  this post-processes the JSON to convert the marked code strings to raw code.
  
  Example:
  CodeMarker.postProcess(
  JSON.stringify({code: CodeMarker.mark('alert(1)')})
  )