Using Google drive apis to update worksheet

I have to update a google drive worksheet without changing its id.The api documentation asks to initiate service for sheets using getsheetservice but code throws error that the method is not defined for spreadsheets.

Any idea why the error is shown? My req is simple.All i have to do is update a worksheet (not whole spreadsheet) to existing worksheet in google drive.I am using the worksheet in other worksheet uding import function,so id shld be same. Any better suggestions?