IsolateOnInitialCallback<T> typedef
IsolateOnInitialCallback<T> =
FutureOr<void> Function(IsolateManagerController controller, T initialParams)
A callback for the IsolateManagerFunction.customFunction that will be executed only one time before all events.
Implementation
typedef IsolateOnInitialCallback<T> = FutureOr<void> Function(
IsolateManagerController controller, T initialParams);