WT1.1.11 Null-Safe migration

lib/bloc/exercise_execute_plan/exercise_execute_plan_bloc.dart

@@ -14,16 +14,17 @@ part 'exercise_execute_plan_state.dart';
 class ExerciseExecutePlanBloc extends Bloc<ExerciseExecutePlanEvent, ExerciseExecutePlanState> {
   final WorkoutTreeRepository menuTreeRepository;
   final ExercisePlanRepository exercisePlanRepository = ExercisePlanRepository();
-  int customerId;
+  int? customerId;
   int selectedNumber = 0;
+
   @override
-  ExerciseExecutePlanBloc({this.menuTreeRepository}) : super(ExerciseByPlanStateInitial());
+  ExerciseExecutePlanBloc({required this.menuTreeRepository}) : super(ExerciseByPlanStateInitial());
 
   Future<void> getData() async {
-    exercisePlanRepository.setCustomerId(customerId);
+    exercisePlanRepository.setCustomerId(customerId!);
     await exercisePlanRepository.getLastExercisePlan();
     await exercisePlanRepository.getExercisePlanDetails();
-    menuTreeRepository.sortedTree = null;
+    menuTreeRepository.sortedTree.clear();
     menuTreeRepository.sortByMuscleType();
 
     menuTreeRepository.sortedTree.forEach((key, value) {

lib/bloc/exercise_execute_plan/exercise_execute_plan_event.dart

@@ -10,7 +10,7 @@ abstract class ExerciseExecutePlanEvent extends Equatable {
 
 class AddExerciseByPlanEvent extends ExerciseExecutePlanEvent {
   final ExerciseType exerciseType;
-  const AddExerciseByPlanEvent({this.exerciseType});
+  const AddExerciseByPlanEvent({required this.exerciseType});
 
   @override
   List<Object> get props => [exerciseType];

lib/bloc/exercise_execute_plan/exercise_execute_plan_state.dart

@@ -24,8 +24,8 @@ class ExerciseByPlanReady extends ExerciseExecutePlanState {
 // error splash screen
 class ExerciseByPlanError extends ExerciseExecutePlanState {
   final String message;
-  const ExerciseByPlanError({this.message});
+  const ExerciseByPlanError({required this.message});
 
   @override
   List<Object> get props => [message];
-}
+}