Some name

Module.php

public function getViewHelperConfig()
    {
        return array(
            'invokables' => array(
                'flashMessenger' => 'TulaBase\View\Helper\FlashMessenger',
                'custom' => 'TulaInventory\Form\Element\CustomElement',
            ),
            'factories' => array(
                'absoluteUrl' => function ($sm) {
                    return new \TulaBase\View\Helper\AbsoluteUrl($sm->getServiceLocator()->get('Request'));
                },
            ),
        );
    }