How to export from Illustrator to JPG with CMYK palette?

Question

Adobe Illustrator

file = new File(fileName);
options = new ExportOptionsJPEG ();
options.antiAliasing = true;
options.artBoardClipping = true;
options.verticalScale = resolution;
options.horizontalScale = resolution;
document.exportFile(file, ExportType.JPEG, options);

Here is an example when to export to Illustrator. Tell me, what function should I add to export to CMYK? (without changing the palette in the document settings, namely through the script).
I noticed that even if you change the palette to CMYK in the document settings, then when you run the script, you get a file in the RGB palette.
Thank you.