This component is really just useful when you need to trap the focus within some container.
The most common example is within Dialogs. This only traps the keyboard navigation, so a user
can actually still click outside of it.
Contained Form Examplelink
This example will show how you can trap keyboard focus inside of a form. The tab focus will only be allowed on non-disabled cells and components that are considered tabbable.
A few components use this behind the scenes for keyboard accessibility.