input: 
  def is_victory(icon: str) -> bool:
      """ Check if the given icon ('X' or 'O') has achieved a winning condition in a Tic Tac Toe game.
      >>> is_victory("X")
      False
      >>> is_victory("O")
      False
      """
  
output:     winning_combinations = [
          [0, 1, 2], [3, 4, 5], [6, 7, 8],  # Rows
          [0, 3, 6], [1, 4, 7], [2, 5, 8],  # Columns
          [0, 4, 8], [2, 4, 6]              # Diagonals
      ]
      
      board = [" " for _ in range(9)]  # Assuming a 3x3 board for Tic Tac Toe
      
      for combination in winning_combinations:
          if all(board[i] == icon for i in combination):
              return True
      return False