Validating a string starts with a substring

import 'package:luthor/luthor.dart';

void main() {
  final validator = l.string().startsWith('Hello');
  print(validator.validateValue('Hello World!'));
}

import 'package:luthor/luthor.dart';
import 'package:freezed_annotation/freezed_annotation.dart';

part 'starts_with.freezed.dart';
part 'starts_with.g.dart';

@freezed
@luthor
class StartsWithSchema extends _$StartsWithSchema {
  const factory StartsWithSchema({
    required String value,
  }) = _$StartsWithSchema;

  static SchemaValidationResult<StartsWithSchema> validate(
    Map<String, dynamic> json,
  ) =>
      _$StartsWithSchemaValidate(json);

  factory StartsWithSchema.fromJson(Map<String, dynamic> json) =>
      _$StartsWithSchemaFromJson(json);
}

void main() {
  print(StartsWithSchema.validate({'value': 'Hello World!'}));
}