private function getFilterFactory(): IFilterSettingFactory
    {
        if (null === $this->filterFactory) {
            return $this->filterFactory = System::getContainer()->get('metamodels.filter_setting_factory');
        }

        return $this->filterFactory;
    }
private function getFilterFactory(): IFilterSettingFactory
    {
        if (null === $this->filterFactory) {
            return $this->filterFactory = System::getContainer()->get('metamodels.filter_setting_factory');
        }

        return $this->filterFactory;
    }
private function getFilterFactory ( ) : IFilterSettingFactory { if ( null === $ this -> filterFactory ) { return $ this -> filterFactory = System :: getContainer ( ) -> get ( 'metamodels.filter_setting_factory' ) ; } return $ this -> filterFactory ; }
Obtain the filter setting factory.

@return IFilterSettingFactory
Obtain the filter setting factory .