FluidTYPO3\Vhs\ViewHelpers\Menu\AbstractMenuViewHelper::cleanupSubmenuVariables PHP Method

    protected function cleanupSubmenuVariables()
    {
        if (false === $this->original) {
            return null;
        }
        if (false === $this->viewHelperVariableContainer->exists(AbstractMenuViewHelper::class, 'parentInstance')) {
            return null;
        }
        $this->viewHelperVariableContainer->remove(AbstractMenuViewHelper::class, 'parentInstance');
        $this->viewHelperVariableContainer->remove(AbstractMenuViewHelper::class, 'variables');
    }