buttonBuilder property
The main button builder. This will typically return a FloatingActionButton. However any widget with an intrinsic size might be returned here.
When implementing this you should pass the toggle function to your onPress callback.
The isActive parameter indicates whether the button is disclosed/active or collapsed/inactive.
This can be used to change the style of the button for example by using an AnimatedSwitcher
Implementation
final SpeedDialButtonBuilder buttonBuilder;