diff --git a/test/error_test.dart b/test/error_test.dart
deleted file mode 100644
index 3b90980..0000000
--- a/test/error_test.dart
+++ /dev/null
@@ -1,33 +0,0 @@
-import 'dart:io';
-
-import 'package:build/build.dart';
-import 'package:build_test/build_test.dart';
-import 'package:isar_generator/isar_generator.dart';
-import 'package:test/test.dart';
-
-void main() {
-  group('Error case', () {
-    for (final file in Directory('test/errors').listSync(recursive: true)) {
-      if (file is! File || !file.path.endsWith('.dart')) continue;
-
-      test(file.path, () async {
-        final content = await file.readAsLines();
-
-        final errorMessage = content.first.split('//').last.trim();
-
-        var error = '';
-        try {
-          await testBuilder(
-            getIsarGenerator(BuilderOptions.empty),
-            {'a|${file.path}': content.join('\n')},
-            reader: await PackageAssetReader.currentIsolate(),
-          );
-        } catch (e) {
-          error = e.toString();
-        }
-
-        expect(error.toLowerCase(), contains(errorMessage.toLowerCase()));
-      });
-    }
-  });
-}
diff --git a/test/errors/class/abstract.dart b/test/errors/class/abstract.dart
deleted file mode 100644
index b116529..0000000
--- a/test/errors/class/abstract.dart
+++ /dev/null
@@ -1,8 +0,0 @@
-// must not be abstract
-
-import 'package:isar/isar.dart';
-
-@collection
-abstract class Model {
-  Id? id;
-}
diff --git a/test/errors/class/collection_supertype.dart b/test/errors/class/collection_supertype.dart
deleted file mode 100644
index e6e3f8d..0000000
--- a/test/errors/class/collection_supertype.dart
+++ /dev/null
@@ -1,19 +0,0 @@
-// supertype annotated with @collection
-
-import 'package:isar/isar.dart';
-
-@collection
-class Supertype {
-  Id? id;
-}
-
-class Subtype implements Supertype {
-  @override
-  Id? id;
-}
-
-@collection
-class Model implements Subtype {
-  @override
-  Id? id;
-}
diff --git a/test/errors/class/constructor_named.dart b/test/errors/class/constructor_named.dart
deleted file mode 100644
index 713f795..0000000
--- a/test/errors/class/constructor_named.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-// unnamed constructor
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Model.create();
-
-  Id? id;
-}
diff --git a/test/errors/class/constructor_unknown_parameter.dart b/test/errors/class/constructor_unknown_parameter.dart
deleted file mode 100644
index 768e349..0000000
--- a/test/errors/class/constructor_unknown_parameter.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-// constructor parameter does not match a property
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  // ignore: avoid_unused_constructor_parameters
-  Model(this.prop1, String somethingElse);
-
-  Id? id;
-
-  final String prop1;
-}
diff --git a/test/errors/class/constructor_wrong_parameter.dart b/test/errors/class/constructor_wrong_parameter.dart
deleted file mode 100644
index 1274a5c..0000000
--- a/test/errors/class/constructor_wrong_parameter.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-// constructor parameter type does not match property type
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  // ignore: avoid_unused_constructor_parameters
-  Model(int prop1);
-
-  Id? id;
-
-  String prop1 = '5';
-}
diff --git a/test/errors/class/enum.dart b/test/errors/class/enum.dart
deleted file mode 100644
index a51d088..0000000
--- a/test/errors/class/enum.dart
+++ /dev/null
@@ -1,7 +0,0 @@
-// only classes
-
-import 'package:isar/isar.dart';
-
-// ignore: invalid_annotation_target
-@collection
-enum Test { a, b, c }
diff --git a/test/errors/class/invalid_name.dart b/test/errors/class/invalid_name.dart
deleted file mode 100644
index b116529..0000000
--- a/test/errors/class/invalid_name.dart
+++ /dev/null
@@ -1,8 +0,0 @@
-// must not be abstract
-
-import 'package:isar/isar.dart';
-
-@collection
-abstract class Model {
-  Id? id;
-}
diff --git a/test/errors/class/mixin.dart b/test/errors/class/mixin.dart
deleted file mode 100644
index a6a6374..0000000
--- a/test/errors/class/mixin.dart
+++ /dev/null
@@ -1,7 +0,0 @@
-// only classes
-
-import 'package:isar/isar.dart';
-
-// ignore: invalid_annotation_target
-@collection
-mixin Test {}
diff --git a/test/errors/class/private.dart b/test/errors/class/private.dart
deleted file mode 100644
index aa545b9..0000000
--- a/test/errors/class/private.dart
+++ /dev/null
@@ -1,9 +0,0 @@
-// must be public
-
-import 'package:isar/isar.dart';
-
-@collection
-// ignore: unused_element
-class _Model {
-  Id? id;
-}
diff --git a/test/errors/class/variable.dart b/test/errors/class/variable.dart
deleted file mode 100644
index 543a78e..0000000
--- a/test/errors/class/variable.dart
+++ /dev/null
@@ -1,7 +0,0 @@
-// only classes
-
-import 'package:isar/isar.dart';
-
-// ignore: invalid_annotation_target
-@collection
-const t = 'hello';
diff --git a/test/errors/id/duplicate.dart b/test/errors/id/duplicate.dart
deleted file mode 100644
index e96e21f..0000000
--- a/test/errors/id/duplicate.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-// two or more properties with type "Id" defined
-
-import 'package:isar/isar.dart';
-
-@collection
-class Test {
-  Id? id1;
-
-  Id? id2;
-}
diff --git a/test/errors/id/missing.dart b/test/errors/id/missing.dart
deleted file mode 100644
index e414174..0000000
--- a/test/errors/id/missing.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-// no id property defined
-
-import 'package:isar/isar.dart';
-
-@collection
-class Test {
-  late int id;
-
-  late String name;
-}
diff --git a/test/errors/index/composite_double_not_last.dart b/test/errors/index/composite_double_not_last.dart
deleted file mode 100644
index 135b56b..0000000
--- a/test/errors/index/composite_double_not_last.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-// only the last property of a composite index may be a double value
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(composite: [CompositeIndex('val2')])
-  double? val1;
-
-  String? val2;
-}
diff --git a/test/errors/index/composite_non_hashed_list.dart b/test/errors/index/composite_non_hashed_list.dart
deleted file mode 100644
index e93241e..0000000
--- a/test/errors/index/composite_non_hashed_list.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-// composite indexes do not support non-hashed lists
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(composite: [CompositeIndex('str')], type: IndexType.value)
-  List<int>? list;
-
-  String? str;
-}
diff --git a/test/errors/index/composite_string_value_not_last.dart b/test/errors/index/composite_string_value_not_last.dart
deleted file mode 100644
index 52efbf8..0000000
--- a/test/errors/index/composite_string_value_not_last.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-// last property of a composite index may be a non-hashed string
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(composite: [CompositeIndex('str2')], type: IndexType.value)
-  String? str1;
-
-  String? str2;
-}
diff --git a/test/errors/index/contains_id.dart b/test/errors/index/contains_id.dart
deleted file mode 100644
index fd45fb2..0000000
--- a/test/errors/index/contains_id.dart
+++ /dev/null
@@ -1,11 +0,0 @@
-// ids cannot be indexed
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(composite: [CompositeIndex('id')])
-  String? str;
-}
diff --git a/test/errors/index/double_list_hashed.dart b/test/errors/index/double_list_hashed.dart
deleted file mode 100644
index 84563d4..0000000
--- a/test/errors/index/double_list_hashed.dart
+++ /dev/null
@@ -1,11 +0,0 @@
-// list<double> may must not be hashed
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(type: IndexType.hash)
-  List<double>? list;
-}
diff --git a/test/errors/index/duplicate_name.dart b/test/errors/index/duplicate_name.dart
deleted file mode 100644
index 17e6cab..0000000
--- a/test/errors/index/duplicate_name.dart
+++ /dev/null
@@ -1,14 +0,0 @@
-// same name
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(name: 'myindex')
-  String? prop1;
-
-  @Index(name: 'myindex')
-  String? prop2;
-}
diff --git a/test/errors/index/duplicate_property.dart b/test/errors/index/duplicate_property.dart
deleted file mode 100644
index 01c53f0..0000000
--- a/test/errors/index/duplicate_property.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-// composite index contains duplicate properties
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(composite: [CompositeIndex('str1')], type: IndexType.value)
-  String? str1;
-
-  String? str2;
-}
diff --git a/test/errors/index/invalid_name.dart b/test/errors/index/invalid_name.dart
deleted file mode 100644
index 171fe3a..0000000
--- a/test/errors/index/invalid_name.dart
+++ /dev/null
@@ -1,11 +0,0 @@
-// names must not be blank or start with "_"
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(name: '_index')
-  String? str;
-}
diff --git a/test/errors/index/non_string_hashed.dart b/test/errors/index/non_string_hashed.dart
deleted file mode 100644
index 63267d6..0000000
--- a/test/errors/index/non_string_hashed.dart
+++ /dev/null
@@ -1,11 +0,0 @@
-// only strings and lists may be hashed
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(type: IndexType.hash)
-  int? val;
-}
diff --git a/test/errors/index/non_string_list_hashed_elements.dart b/test/errors/index/non_string_list_hashed_elements.dart
deleted file mode 100644
index 4f119fc..0000000
--- a/test/errors/index/non_string_list_hashed_elements.dart
+++ /dev/null
@@ -1,11 +0,0 @@
-// only string lists may have hashed elements
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(type: IndexType.hashElements)
-  List<int>? list;
-}
diff --git a/test/errors/index/non_unique_replace.dart b/test/errors/index/non_unique_replace.dart
deleted file mode 100644
index 9a49b37..0000000
--- a/test/errors/index/non_unique_replace.dart
+++ /dev/null
@@ -1,11 +0,0 @@
-// only unique indexes can replace
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(replace: true)
-  String? str;
-}
diff --git a/test/errors/index/object_hashed.dart b/test/errors/index/object_hashed.dart
deleted file mode 100644
index dd20d11..0000000
--- a/test/errors/index/object_hashed.dart
+++ /dev/null
@@ -1,14 +0,0 @@
-// objects may not be indexed
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index()
-  EmbeddedModel? obj;
-}
-
-@embedded
-class EmbeddedModel {}
diff --git a/test/errors/index/object_list_hashed.dart b/test/errors/index/object_list_hashed.dart
deleted file mode 100644
index d149e19..0000000
--- a/test/errors/index/object_list_hashed.dart
+++ /dev/null
@@ -1,14 +0,0 @@
-// objects may not be indexed
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(type: IndexType.hash)
-  List<EmbeddedModel>? list;
-}
-
-@embedded
-class EmbeddedModel {}
diff --git a/test/errors/index/property_does_not_exist.dart b/test/errors/index/property_does_not_exist.dart
deleted file mode 100644
index 806515e..0000000
--- a/test/errors/index/property_does_not_exist.dart
+++ /dev/null
@@ -1,11 +0,0 @@
-// property does not exist
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Index(composite: [CompositeIndex('myProp')])
-  String? str;
-}
diff --git a/test/errors/link/backlink_target_does_no_exist.dart b/test/errors/link/backlink_target_does_no_exist.dart
deleted file mode 100644
index ea285c2..0000000
--- a/test/errors/link/backlink_target_does_no_exist.dart
+++ /dev/null
@@ -1,16 +0,0 @@
-// target of backlink does not exist
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model1 {
-  Id? id;
-
-  @Backlink(to: 'abc')
-  final IsarLink<Model2> link = IsarLink();
-}
-
-@collection
-class Model2 {
-  Id? id;
-}
diff --git a/test/errors/link/backlink_target_is_backlink.dart b/test/errors/link/backlink_target_is_backlink.dart
deleted file mode 100644
index 5d5f48d..0000000
--- a/test/errors/link/backlink_target_is_backlink.dart
+++ /dev/null
@@ -1,19 +0,0 @@
-// target of backlink is also a backlink
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model1 {
-  Id? id;
-
-  @Backlink(to: 'link')
-  final IsarLink<Model2> link = IsarLink();
-}
-
-@collection
-class Model2 {
-  Id? id;
-
-  @Backlink(to: 'link')
-  final IsarLink<Model1> link = IsarLink();
-}
diff --git a/test/errors/link/backlink_target_not_a_link.dart b/test/errors/link/backlink_target_not_a_link.dart
deleted file mode 100644
index 459ecd3..0000000
--- a/test/errors/link/backlink_target_not_a_link.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-// target of backlink is not a link
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model1 {
-  Id? id;
-
-  @Backlink(to: 'str')
-  final IsarLink<Model2> link = IsarLink();
-}
-
-@collection
-class Model2 {
-  Id? id;
-
-  String? str;
-}
diff --git a/test/errors/link/duplicate_name.dart b/test/errors/link/duplicate_name.dart
deleted file mode 100644
index 1405c4a..0000000
--- a/test/errors/link/duplicate_name.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-// same name
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  final IsarLink<Model2> prop1 = IsarLink();
-
-  @Name('prop1')
-  final IsarLinks<Model2> prop2 = IsarLinks();
-}
-
-@collection
-class Model2 {
-  Id? id;
-}
diff --git a/test/errors/link/invalid_name.dart b/test/errors/link/invalid_name.dart
deleted file mode 100644
index 47b89a9..0000000
--- a/test/errors/link/invalid_name.dart
+++ /dev/null
@@ -1,16 +0,0 @@
-// names must not be blank or start with
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Name('_link')
-  final IsarLink<Model2> link = IsarLink();
-}
-
-@collection
-class Model2 {
-  Id? id;
-}
diff --git a/test/errors/link/late.dart b/test/errors/link/late.dart
deleted file mode 100644
index 845cf27..0000000
--- a/test/errors/link/late.dart
+++ /dev/null
@@ -1,15 +0,0 @@
-// must not be late
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  late IsarLink<Model2> link;
-}
-
-@collection
-class Model2 {
-  Id? id;
-}
diff --git a/test/errors/link/nullable.dart b/test/errors/link/nullable.dart
deleted file mode 100644
index ab1f588..0000000
--- a/test/errors/link/nullable.dart
+++ /dev/null
@@ -1,15 +0,0 @@
-// must not be nullable
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  IsarLink<Model2>? link;
-}
-
-@collection
-class Model2 {
-  Id? id;
-}
diff --git a/test/errors/link/target_not_a_collection.dart b/test/errors/link/target_not_a_collection.dart
deleted file mode 100644
index dd7d3cd..0000000
--- a/test/errors/link/target_not_a_collection.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-// link target is not annotated with @collection
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  final IsarLink<int> link = IsarLink();
-}
diff --git a/test/errors/link/type_nullable.dart b/test/errors/link/type_nullable.dart
deleted file mode 100644
index 865d421..0000000
--- a/test/errors/link/type_nullable.dart
+++ /dev/null
@@ -1,15 +0,0 @@
-// links type must not be nullable
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  final IsarLink<Model2?> link = IsarLink();
-}
-
-@collection
-class Model2 {
-  Id? id;
-}
diff --git a/test/errors/property/duplicate_name.dart b/test/errors/property/duplicate_name.dart
deleted file mode 100644
index 0b275cb..0000000
--- a/test/errors/property/duplicate_name.dart
+++ /dev/null
@@ -1,13 +0,0 @@
-// same name
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  String? prop1;
-
-  @Name('prop1')
-  String? prop2;
-}
diff --git a/test/errors/property/enum_bool_type.dart b/test/errors/property/enum_bool_type.dart
deleted file mode 100644
index d5b4b44..0000000
--- a/test/errors/property/enum_bool_type.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-// unsupported enum property type
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Enumerated(EnumType.value, 'value')
-  late MyEnum field;
-}
-
-enum MyEnum {
-  optionA;
-
-  final bool value = true;
-}
diff --git a/test/errors/property/enum_double_type.dart b/test/errors/property/enum_double_type.dart
deleted file mode 100644
index 17567e6..0000000
--- a/test/errors/property/enum_double_type.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-// unsupported enum property type
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Enumerated(EnumType.value, 'value')
-  late MyEnum field;
-}
-
-enum MyEnum {
-  optionA;
-
-  final double value = 5.5;
-}
diff --git a/test/errors/property/enum_duplicate.dart b/test/errors/property/enum_duplicate.dart
deleted file mode 100644
index 32ce056..0000000
--- a/test/errors/property/enum_duplicate.dart
+++ /dev/null
@@ -1,21 +0,0 @@
-// has duplicate values
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Enumerated(EnumType.value, 'value')
-  late MyEnum field;
-}
-
-enum MyEnum {
-  option1(1),
-  option2(2),
-  option3(1);
-
-  const MyEnum(this.value);
-
-  final int value;
-}
diff --git a/test/errors/property/enum_float_type.dart b/test/errors/property/enum_float_type.dart
deleted file mode 100644
index abf3830..0000000
--- a/test/errors/property/enum_float_type.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-// unsupported enum property type
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Enumerated(EnumType.value, 'value')
-  late MyEnum field;
-}
-
-enum MyEnum {
-  optionA;
-
-  final float value = 5.5;
-}
diff --git a/test/errors/property/enum_list_type.dart b/test/errors/property/enum_list_type.dart
deleted file mode 100644
index 75d78e2..0000000
--- a/test/errors/property/enum_list_type.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-// unsupported enum property type
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Enumerated(EnumType.value, 'value')
-  late MyEnum prop;
-}
-
-enum MyEnum {
-  optionA;
-
-  final List<String> value = [];
-}
diff --git a/test/errors/property/enum_not_annotated.dart b/test/errors/property/enum_not_annotated.dart
deleted file mode 100644
index 456e8e4..0000000
--- a/test/errors/property/enum_not_annotated.dart
+++ /dev/null
@@ -1,14 +0,0 @@
-// enum property must be annotated with @enumerated
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  late MyEnum? prop;
-}
-
-enum MyEnum {
-  a;
-}
diff --git a/test/errors/property/enum_null_value.dart b/test/errors/property/enum_null_value.dart
deleted file mode 100644
index bdc2e30..0000000
--- a/test/errors/property/enum_null_value.dart
+++ /dev/null
@@ -1,17 +0,0 @@
-// null values are not supported
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Enumerated(EnumType.value, 'value')
-  late MyEnum prop;
-}
-
-enum MyEnum {
-  optionA;
-
-  final String? value = null;
-}
diff --git a/test/errors/property/enum_object_type.dart b/test/errors/property/enum_object_type.dart
deleted file mode 100644
index afa6d96..0000000
--- a/test/errors/property/enum_object_type.dart
+++ /dev/null
@@ -1,20 +0,0 @@
-// unsupported enum property type
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Enumerated(EnumType.value, 'value')
-  late MyEnum prop;
-}
-
-enum MyEnum {
-  optionA;
-
-  final value = EmbeddedModel();
-}
-
-@embedded
-class EmbeddedModel {}
diff --git a/test/errors/property/invalid_name.dart b/test/errors/property/invalid_name.dart
deleted file mode 100644
index 5bc5341..0000000
--- a/test/errors/property/invalid_name.dart
+++ /dev/null
@@ -1,11 +0,0 @@
-// names must not be blank or start with "_"
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  @Name('_prop')
-  String? prop;
-}
diff --git a/test/errors/property/null_byte.dart b/test/errors/property/null_byte.dart
deleted file mode 100644
index c581380..0000000
--- a/test/errors/property/null_byte.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-// bytes must not be nullable
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  late byte? prop;
-}
diff --git a/test/errors/property/null_byte_element.dart b/test/errors/property/null_byte_element.dart
deleted file mode 100644
index d45c4b1..0000000
--- a/test/errors/property/null_byte_element.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-// bytes must not be nullable
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  late List<byte?> prop;
-}
diff --git a/test/errors/property/unsupported_type.dart b/test/errors/property/unsupported_type.dart
deleted file mode 100644
index 68af2cf..0000000
--- a/test/errors/property/unsupported_type.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-// unsupported type
-
-import 'package:isar/isar.dart';
-
-@collection
-class Model {
-  Id? id;
-
-  late Set<String>? prop;
-}