public function registerChecker(CheckerInterface $checker)
    {
        if (!$this->hasChecker($checker)) {
            $this->checkers[] = $checker;
        }

        return $this;
    }
public function registerChecker(CheckerInterface $checker)
    {
        if (!$this->hasChecker($checker)) {
            $this->checkers[] = $checker;
        }

        return $this;
    }
public function registerChecker ( CheckerInterface $ checker ) { if ( ! $ this -> hasChecker ( $ checker ) ) { $ this -> checkers [ ] = $ checker ; } return $ this ; }
Registers a checker

@param  CheckerInterface $checker The checker to register
@return Manager
Registers a checker