public function toString()
    {
        $constraints = [];
        foreach ($this->constraints as $name=>$constraint) {
            $constraints[] = "$constraint";
        }
        return implode($this->toStringSeparator, $constraints);
    }
public function toString()
    {
        $constraints = [];
        foreach ($this->constraints as $name=>$constraint) {
            $constraints[] = "$constraint";
        }
        return implode($this->toStringSeparator, $constraints);
    }
public function toString ( ) { $ constraints = [ ] ; foreach ( $ this -> constraints as $ name => $ constraint ) { $ constraints [ ] = "$constraint" ; } return implode ( $ this -> toStringSeparator , $ constraints ) ; }
Returns a rendered version of the constraints.

@return string
Returns a rendered version of the constraints .