Downloading a PDF version of the open spreadsheet in Google Drive via scripts

I've been reading up on how to save a spreadsheet to PDF via Google Docs Scripting. Most suggestions I've come across reference using something like:

theOutputFile.saveAndClose();
DocsList.createFile(theOutputFile.getAs('application/pdf')).rename(theOutputName+".pdf");

That is, they reference the saveAndClose() function. I don't want to save or close my spreadsheet - but I do want to download the current sheet as a PDF.

For saving the current sheet as a PDF, you can hide all the other sheets, save the current, & then show all sheets again. The pdf creation might start before the end of the sheets' hiding and then will include 2 sheets - the current & the last sheets - in the pdf file. Adding a sleep or a confirmation msgbox, between showOneSheet & createPdf eliminated the problem.

This answer is a variation of Marco Zoqui's answer: "To send a single sheet you may hide all other before sending" in Google Apps Script to Email Active Spreadsheet

var sheet = SpreadsheetApp.getActiveSheet();
var sheetToSave = sheet.getName();

showOneSheet(sheetToSave);
Utilities.sleep(2000);
createPdf("TestFolder", "TestPDF");
showAllSheets();  

function showOneSheet(SheetToShow) {
  var sheets = SpreadsheetApp.getActiveSpreadsheet().getSheets();
  for(var i in sheets){
    if (sheets[i].getName()==SheetToShow){
      sheets[i].showSheet();
    }
    else {
      sheets[i].hideSheet();
    }
  }
}

function showAllSheets() {
  var sheets = SpreadsheetApp.getActiveSpreadsheet().getSheets();
  for(var i in sheets){
      sheets[i].showSheet();
  }
}

function createPdf(saveToFolder, fileName){

  var ssa = SpreadsheetApp.getActiveSpreadsheet();
  var pdf = ssa.getAs("application/pdf"); 
  try {
    var folder = DocsList.getFolder(saveToFolder);
  }
  //Create Folder if not exists
  catch(error){
    folder = DocsList.createFolder(saveToFolder);
  }
  var file = folder.createFile(pdf);
  file.rename(fileName);

  return file;
}