private boolean moveSapperAndFillFreeCell(Direction direction) {
walkAt.put(sapper.copy(), getMinesNearSapper());
direction.change(sapper);
boolean wasHere = walkAt.containsKey(sapper.copy());
return !wasHere;
}
@Override
public Point getCellPossiblePosition(Direction direction) {
return direction.change(sapper.copy());
}