opt: blacklist (#501)

lib/utils/set_int_adapter.dart

@@ -0,0 +1,26 @@
+import 'package:hive/hive.dart';
+
+class SetIntAdapter extends TypeAdapter<Set<int>> {
+  @override
+  final int typeId = 11;
+
+  @override
+  Set<int> read(BinaryReader reader) {
+    return reader.readIntList().toSet();
+  }
+
+  @override
+  void write(BinaryWriter writer, Set<int> obj) {
+    writer.writeIntList(obj.toList());
+  }
+
+  @override
+  int get hashCode => typeId.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is SetIntAdapter &&
+          runtimeType == other.runtimeType &&
+          typeId == other.typeId;
+}