StateTransitionListener<T extends AuthController> typedef
StateTransitionListener<T extends AuthController> =
void Function(AuthState oldState, AuthState newState, T controller)
A callback that is being called when AuthFlow changes it's state.
Invoked before the widget is built.
Implementation
typedef StateTransitionListener<T extends AuthController> = void Function(
/// Previous state of the [AuthFlow].
AuthState oldState,
/// Current state of the [AuthFlow].
AuthState newState,
/// An instance of the [AuthController] that could be used to manipulate the
/// [AuthFlow].
T controller,
);