Is it possible to use the checkout function for multible files?

Hi, is it possible to use the checkout function for multible files at once?

Item file = this.newItem("File","get");
file.setAttribute("idlist", idlist); // <- contains multible file id´s, checkout do not work
// file.setID(id); // <- contains one file id, checkout works
file=file.apply();
file.checkout("C:\\temp\\test");	

The above example works fine for a single file. My idea was, to use the idlist attribute for checkout multible files. But the checkout Method doesn´t accept this (no single item). Is there another solution for this case? I want to avoid using a FOR loop for file checkout to keep the server load low. Best regards! Angela