done and done

done and done

Totally, unequivocally finished or finalized. Just one more piece to the puzzle, and... there! Done and done!
See also: and, done

done and done

mod. completed and finalized; signed, sealed, and delivered. Sure I finished. It’s done and done.
See also: and, done
References in classic literature ?
What he could guess, however, was that the moment the two officers came within firing distance of the beast they would put an end to him in short order unless something were done and done quickly to prevent.