getViewImageFieldName example

public function postDispatch()
    {
        parent::postDispatch();

        $this->View()->assign('sType', $this->type);
        $this->View()->assign('sFields', $this->getFields());
        $this->View()->assign('sAction', $this->Request()->getActionName());
        $this->View()->assign('sTitleKey', $this->type->getViewTitleFieldName());
        $this->View()->assign('sMetaTitleKey', $this->type->getViewMetaTitleFieldName());
        $this->View()->assign('sDescriptionKey', $this->type->getViewDescriptionFieldName());
        $this->View()->assign('sMetaDescriptionKey', $this->type->getViewMetaDescriptionFieldName());
        $this->View()->assign('sImageKey', $this->type->getViewImageFieldName());

        if (!$this->View()->templateExists($this->View()->Template()->template_resource)) {
            if ($this->Request()->getActionName() === 'index') {
                $this->View()->Template()->template_resource = 'frontend/content_type/index.tpl';

                return;
            }

            $this->View()->Template()->template_resource = 'frontend/content_type/detail.tpl';
        }
    }