fix

Author: jperezrealini

typehelpers/json_serializable_fic_typehelpers/lib/src/fic_type_helpers.dart

@@ -148,7 +148,6 @@ class FICListMapTypeHelper extends CustomMapTypeHelper<ListMap> {
 }
 
 class FICIMapOfSetsTypeHelper extends TypeHelper<TypeHelperContextWithConfig> {
-  @override
   final TypeChecker typeChecker = const TypeChecker.typeNamed(
     IMapOfSets,
     inPackage: 'fast_immutable_collections',
@@ -208,7 +207,6 @@ class FICIMapOfSetsTypeHelper extends TypeHelper<TypeHelperContextWithConfig> {
     final keyType = _getKeyType(targetType);
     final valueType = _getValueType(targetType);
     final targetTypeIsNullable = targetType.isNullableType || defaultProvided;
-    final optionalQuestion = targetTypeIsNullable ? '?' : '';
 
     checkSafeKeyType(expression, keyType);
 

typehelpers/json_serializable_fic_typehelpers/pubspec.yaml

@@ -14,6 +14,7 @@ dependencies:
   json_serializable: ^6.11.4
   json_serializable_type_helper_utils: ^6.0.2
   analyzer: ^10.0.1
+  source_helper: ^1.2.1
 
 dev_dependencies:
   lints: ^6.0.0