class HomepageSingleWithSeriesStories
Homepage layout that provides one BIG featured story and several other stories from the same Series.

If the Series taxonomy is not enabled, this class should unregister itself.

The default homepage layouts are listed in homepages/homepage.php. For each default layout, register_homepage_layout is called on that layout class. register_homepage_layout calls the HomepageLayoutFactory method register on that class instance the register method creates a new instance of that class therefore the __construct method below checks largo_is_series_enabled and adds an auto-removal function to the init hook of series are not enabled.