VITEC-website/packages/vitec/ContentBlocks/ContentElements/featured-content/templates/frontend.html

<html xmlns:f="http://typo3.org/ns/TYPO3/CMS/Fluid/ViewHelpers" data-namespace-typo3-fluid="true">
<!-- Headless mode: JSON is built by nb-headless-content-blocks -->
</html>
	`<html xmlns:f="http://typo3.org/ns/TYPO3/CMS/Fluid/ViewHelpers" data-namespace-typo3-fluid="true">`
	`<!-- Headless mode: JSON is built by nb-headless-content-blocks -->`
	`</html>`