/**
 * getFluidValue
 *
 * @param string $templateName template name (UpperCamelCase)
 * @param array $variables variables to be passed to the Fluid view
 * @param string $format format [optional] can be txt/html
 * @return string
 */
protected function getFluidValue($templateName, array $variables = array(), $format = "html") {
    $tmpView = $this->objectManager->create('Tx_Fluid_View_StandaloneView');
    switch ($format) {
        case "html" :
            $tmpView->setFormat('html');
            break;
        case "txt" :
            $tmpView->setFormat('txt');
            break;
        default:
            $tmpView->setFormat('html');
            break;
    }
    $extbaseFrameworkConfiguration = $this->configurationManager->getConfiguration(Tx_Extbase_Configuration_ConfigurationManagerInterface::CONFIGURATION_TYPE_FRAMEWORK);
    $templateRootPath = t3lib_div::getFileAbsFileName($extbaseFrameworkConfiguration['view']['templateRootPath']);
    $partialRootPath = t3lib_div::getFileAbsFileName($extbaseFrameworkConfiguration['view']['partialRootPath']);
    $templatePathAndFilename = $templateRootPath . $this->request->getControllerName().'/' . $templateName . ".$format";
    $extensionName = $this->request->getControllerExtensionName();
    $tmpView->getRequest()->setControllerExtensionName($extensionName);
    $tmpView->setTemplatePathAndFilename($templatePathAndFilename);
    $tmpView->setPartialRootPath($partialRootPath);
    $tmpView->assignMultiple($variables);
    $content = $tmpView->render();
    return $content;
}