Reloads the list of configuration items.
- iOS 8.0+
- Mac Catalyst 13.0+Beta
In general, a subclass doesn’t need to call this method, unless it determines its configuration items in a deferred way, such as in
presentation. In particular, you don’t need to call this method after you change a configuration item property, because the
SLCompose base class automatically detects and responds to such changes.