private ArrayList<Move> withinGroup(Move inGroup, Player[][] localBoard) {

        //'whose' contains a 'Player' enumeration that represents whether the group is of white or black stones.
        Player whose = localBoard[inGroup.y][inGroup.x];
        int whoseInt;

        if (whose.equals(Player.BLACK)){
                whoseInt = 1;
        }else if(whose.equals(Player.WHITE)) {
                whoseInt = 2;
        }else return null;

        //'whoseInt' contains an integer value, either 1 or 2, that represents which color the group is, 1 for black, and 2 for white

        ArrayList<Move> toVisit = new ArrayList<Move>();

        //toVisit will contain all unvisited stones in the group

        ArrayList<Move> visited = new ArrayList<Move>();

        //visited will contain all visited stones in the group

        Move currentMove = inGroup;
        toVisit.add(inGroup);


        //this loop finds all stones within the group, and adds them to the arraylists.

        while(toVisit.size() > 0) {

            currentMove = toVisit.get(0);

            int[] adjTiles = adjacentTiles(currentMove, localBoard);
            Move moveToCheck = new Move(currentMove.x + 1,currentMove.y);
            if (adjTiles[0] == whoseInt && !toVisit.contains(moveToCheck) && !visited.contains(moveToCheck)){
                toVisit.add(moveToCheck);
            }
            moveToCheck = new Move(currentMove.x,currentMove.y - 1);
            if (adjTiles[1] == whoseInt && !toVisit.contains(moveToCheck) && !visited.contains(moveToCheck)){
                toVisit.add(moveToCheck);
            }
            moveToCheck = new Move(currentMove.x - 1,currentMove.y);
            if (adjTiles[2] == whoseInt && !toVisit.contains(moveToCheck) && !visited.contains(moveToCheck)){
                toVisit.add(moveToCheck);
            }
            moveToCheck = new Move(currentMove.x,currentMove.y + 1);
            if (adjTiles[3] == whoseInt && !toVisit.contains(moveToCheck) && !visited.contains(moveToCheck)){
                toVisit.add(moveToCheck);
            }
            visited.add(currentMove);
            toVisit.remove(toVisit.indexOf(currentMove));
        }

        return visited;
    }