protected function renderTrustedPropertiesField()
{
$formFieldNames = $this->viewHelperVariableContainer->get(\Neos\FluidAdaptor\ViewHelpers\FormViewHelper::class, 'formFieldNames');
$requestHash = $this->mvcPropertyMappingConfigurationService->generateTrustedPropertiesToken($formFieldNames, $this->getFieldNamePrefix());
return '<input type="hidden" name="' . $this->prefixFieldName('__trustedProperties') . '" value="' . htmlspecialchars($requestHash) . '" />' . chr(10);
}