c# - How to duplicate a worksheet using Google API?

Question

I'm trying to create a worksheet in a spreadsheet which is a copy of the existing one. Via Google Docs user interface it is done by 'Duplicate' function of the context menu of a worksheet. Is it possible to copy the whole sheet at once and insert it to the other one? This code:

 public void CopyLastTab(SpreadsheetEntry spreadsheet, string newTabName)
   {
        WorksheetEntry tabToCopy = GetLastTab(spreadsheet);
        tabToCopy.Title.Text = newTabName;
        newTab = service.Insert(GetAllWorksheets(spreadsheet), tabToCopy);           
   }

adds only a new empty worksheet. Copying cell by cell is too long and the matter is I need conditional formatting used on the previous sheet too. Please help.