Tab Widget Example
Apples
                No explicit default was set, so per standard functionality
                this first tabpanel will be shown by default.
              
                Here's a link just to test keyboard tabbing.
                (it's odd talking about tabs, and tabs.)
              
Bananas
                This is an example of a heading being used to populate the
                tab's label, while also not removing heading
                from the tabpanel.  This is done by adding
                the value "keep" to data-atabs-heading.
              
There are two headings here
                The tab is getting its label from the
                data-atabs-tab-label.  The heading is
                kept in the tabpanel because it does
                not have the data-atabs-heading
                attribute.
              
It wouldn't make much sense
                If the contents of a tabpanel contain
                additional sub headings, it wouldn't make sense to remove
                the initial heading from the tabpanel.
                Doing so would create a gap in the heading structure.