如何復制google工作表選項卡并重命名它

這是我的代碼，我試圖讓oldmonths標簽復制自己，并將自己命名為newmonths名稱，但我只是想不出如何讓最后一部分工作。

  var oldMonthName = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("X2").getRange("U4").getValue();//name for the old month, formula in X2
  var newMonthName = SpreadsheetApp.getActiveSpreadsheet().getSheetByName("X2").getRange("U3").getValue();//name for new month, formula in X2
  var oldMonthTab = SpreadsheetApp.getActiveSpreadsheet().getSheetByName(oldMonthName);//old month tab, used to be able to hide it
  
  var destination = SpreadsheetApp.openById('1lQ10rgciG5WiUQ0uVQc1E7r7Qwd6hOkZQSaH');//chooses this spreadsheet, the ID should come from the URL of the sheet it will be copied to.
  oldMonthTab.copyTo(destination).setname(newMonthTab);//makes a copy of old month and sets the name to new month```