docs: public void createFolder(String folderName) throws MessagingException, ApplicationException {
  	if (folderExists(folderName)) throw new ApplicationException("cannot create folder [" + folderName + "], folder already exists.");
  
  	Folder folder = getFolder(folderName, null, false, true);
  	if (!folder.exists()) folder.create(Folder.HOLDS_MESSAGES);
      }