final public function __isset($name): bool
    {
        if ($this->propertyStorage->propertyExists($name)) {
            return true;
        }
        return parent::__isset($name);
    }
final public function __isset($name): bool
    {
        if ($this->propertyStorage->propertyExists($name)) {
            return true;
        }
        return parent::__isset($name);
    }
final public function __isset ( $ name ) : bool { if ( $ this -> propertyStorage -> propertyExists ( $ name ) ) { return true ; } return parent :: __isset ( $ name ) ; }
Magic method.

@param string $name
@return bool
Magic method .