/// <summary>
/// The implementation of the request handler dealing with already revealed cells
/// </summary>
/// <param name="row">The row of the cell</param>
/// <param name="col">The column of the cell</param>
/// <param name="board">The current playing board</param>
public override void HandleRequest(int row, int col, IBoard board)
{
if (board.IsAlreadyShown(row, col))
{
board.ChangeBoardState(new Notification(GlobalMessages.CellAlreadyRevealed, BoardState.Pending));
}
else if (this.Successor != null)
{
this.Successor.HandleRequest(row, col, board);
}
}