Usage
The content file looks something like this:
---
title: Landing page
layout: landing-page
…
---
{{< banner breadcrumbs="true" >}}
{{< landing-page/content-block >}}
…
{{< /landing-page/content-block >}}
{{< landing-page/content-block class="background-light-blue" >}}
…
{{< /landing-page/content-block >}}
{{< callout >}}