public function __construct($parameters){
     $this->minesweepers = new ArrayIterator();
     $fieldId = 1;
     while (strlen($parameters) > 0){
         $minesweeperParameters = new MinesweeperParameters($parameters);
         if ($minesweeperParameters->getRows() > 0){
             $minesweeperParameters->setFieldId($fieldId);
             $minesweeper = new Minesweeper($minesweeperParameters);
             $this->minesweepers->append($minesweeper);
             $fieldId++;
         }
         $parameters = $minesweeperParameters->getUnusedParameters();
         
     }
 }
 public static function generateUnique($parameters){
     $minesweeperParameters = New MinesweeperParameters($parameters);
     $minesweeperParameters->setFieldId(1);
     return new Minesweeper($minesweeperParameters);
 }