src/Charcoal/Admin/Widget/SecondaryMenuWidget.php
protected function secondaryMenu()
    {
        if (!isset($this->secondaryMenu)) {
            throw new RuntimeException(sprintf(
                'Secondary Menu Group Factory is not defined for "%s"',
                get_class($this)
            ));
        }

        return $this->secondaryMenu;
    }
protected function secondaryMenu()
    {
        if (!isset($this->secondaryMenu)) {
            throw new RuntimeException(sprintf(
                'Secondary Menu Group Factory is not defined for "%s"',
                get_class($this)
            ));
        }

        return $this->secondaryMenu;
    }
protected function secondaryMenu ( ) { if ( ! isset ( $ this -> secondaryMenu ) ) { throw new RuntimeException ( sprintf ( 'Secondary Menu Group Factory is not defined for "%s"' , get_class ( $ this ) ) ) ; } return $ this -> secondaryMenu ; }
Retrieve the secondary menu group factory.

@throws RuntimeException If the secondary menu group factory was not previously set.
@return FactoryInterface
Retrieve the secondary menu group factory .