public function initialize(array $config)
    {
        $isMaterializeCss = $this->getConfig('materializeCss', false);

        if ($isMaterializeCss === true) {
            $this->_configWrite('prepareBtnClass', function (Helper $form, $options, $button) {
                return $this->_prepareBtn($form, $options, $button);
            });

            $this->_configWrite('prepareTooltip', function (Helper $html, $options, $tooltip) {
                return $this->_prepareTooltip($html, $options, $tooltip);
            });
        }

        parent::initialize($config);
    }