question: protected void handlePremoveDrop ( int fromSquare , int toSquare ) { PremoveInfo premoveInfo = new PremoveInfo ( ) ; premoveInfo . isPremoveDrop = true ; premoveInfo . toSquare = toSquare ; premoveInfo . fromSquare = fromSquare ; premoveInfo . fromPiece = ChessBoardUtils . pieceJailSquareToPiece ( fromSquare ) ; premoves . add ( premoveInfo ) ; adjustPremoveLabelHighlightsAndArrows ( ) ; board . unhidePieces ( ) ; refreshBoard ( ) ; }
target:  Handles making a premove drop.