nswag.json to flattenInheritanceHierarchy is not working dotnet 6 - .net-core

Question

I'm trying to generate flate type script class using nswag
I belive there's a proprty 'flattenInheritanceHierarchy' that can do what i need. but seems like its not working. not sure what i'm missing.
I have a c# class called Result which is inheriting from Result
public partial record Result
{
public bool IsSucceeded { get; set; }
public string Message { get; set; } = string.Empty;
}
public partial record Result<T> : Result where T : new()
{
public T Value { get; set; } = new T();
}
i'm using it to retunr the result like this
public async Task<IActionResult> Create(CarDto dto)
{
return Ok(new Result<CarDto>());
}
when i generate typescript classes, actual result is
export class Result {
isSucceeded!: boolean;
message!: string;
}
export class ResultOfCarDto extends Result {
value!: CarDto;
}
but i want it like
export class ResultOfCarDto {
isSucceeded!: boolean;
message!: string;
value!: CarDto;
}
here's my nswag.json
{
"runtime": "Net60",
"defaultVariables": null,
"documentGenerator": {
"aspNetCoreToOpenApi": {
"project": "Web.csproj",
"msBuildProjectExtensionsPath": null,
"configuration": null,
"runtime": null,
"targetFramework": null,
"noBuild": true,
"verbose": false,
"workingDirectory": null,
"requireParametersWithoutDefault": true,
"apiGroupNames": null,
"defaultPropertyNameHandling": "CamelCase",
"defaultReferenceTypeNullHandling": "Null",
"defaultDictionaryValueReferenceTypeNullHandling": "NotNull",
"defaultResponseReferenceTypeNullHandling": "NotNull",
"defaultEnumHandling": "Integer",
"flattenInheritanceHierarchy": true,
"generateKnownTypes": true,
"generateEnumMappingDescription": true,
"generateXmlObjects": false,
"generateAbstractProperties": false,
"generateAbstractSchemas": true,
"ignoreObsoleteProperties": true,
"allowReferencesWithProperties": false,
"excludedTypeNames": [],
"serviceHost": null,
"serviceBasePath": null,
"serviceSchemes": [],
"infoTitle": "API",
"infoDescription": null,
"infoVersion": "1.0.0",
"documentTemplate": null,
"documentProcessorTypes": [],
"operationProcessorTypes": [],
"typeNameGeneratorType": null,
"schemaNameGeneratorType": null,
"contractResolverType": null,
"serializerSettingsType": null,
"useDocumentProvider": true,
"documentName": "v1",
"aspNetCoreEnvironment": null,
"createWebHostBuilderMethod": null,
"startupType": null,
"allowNullableBodyParameters": false,
"output": "wwwroot/api/specification.json",
"outputType": "OpenApi3",
"assemblyPaths": [],
"assemblyConfig": null,
"referencePaths": [],
"useNuGetCache": false
}
},
"codeGenerators": {
"openApiToTypeScriptClient": {
"className": "{controller}Client",
"moduleName": "",
"namespace": "",
"typeScriptVersion": 4.3,
"template": "Angular",
"promiseType": "Promise",
"httpClass": "HttpClient",
"withCredentials": false,
"useSingletonProvider": true,
"injectionTokenType": "InjectionToken",
"rxJsVersion": 6.0,
"dateTimeType": "Date",
"nullValue": "Undefined",
"generateClientClasses": false,
"generateClientInterfaces": false,
"generateOptionalParameters": false,
"exportTypes": true,
"wrapDtoExceptions": false,
"exceptionClass": "SwaggerException",
"clientBaseClass": null,
"wrapResponses": false,
"wrapResponseMethods": [],
"generateResponseClasses": true,
"responseClass": "SwaggerResponse",
"protectedMethods": [],
"configurationClass": null,
"useTransformOptionsMethod": false,
"useTransformResultMethod": false,
"flattenInheritanceHierarchy": false,
"generateDtoTypes": true,
"operationGenerationMode": "MultipleClientsFromOperationId",
"markOptionalProperties": false,
"generateCloneMethod": false,
"typeStyle": "Class",
"enumStyle": "Enum",
"useLeafType": true,
"classTypes": [],
"extendedClasses": [],
"extensionCode": null,
"generateDefaultValues": true,
"generateAbstractProperties": false,
"generateAbstractSchemas": false,
"ignoreObsoleteProperties": true,
"excludedTypeNames": [],
"excludedParameterNames": [],
"includeHttpContext": false,
"handleReferences": false,
"generateTypeCheckFunctions": false,
"generateConstructorInterface": false,
"convertConstructorInterfaceData": false,
"importRequiredTypes": true,
"useGetBaseUrlMethod": false,
"baseUrlTokenName": "API_BASE_URL",
"queryNullValue": "",
"inlineNamedDictionaries": false,
"inlineNamedAny": false,
"templateDirectory": null,
"typeNameGeneratorType": null,
"propertyNameGeneratorType": null,
"enumNameGeneratorType": null,
"serviceHost": null,
"serviceSchemes": null,
"output": "ClientApp/src/app/dto/api-dtos.ts"
}
}
}
addtionally its generating 3 fromJS, init and toJSON functions which i also dont want
export class StatusCountDto {
count!: number;
status!: string;
#region I dont want to generate this
init(_data?: any) {
if (_data) {
this.count = _data["count"];
this.status = _data["status"];
}
}
static fromJS(data: any): IssueCountDto {
data = typeof data === 'object' ? data : {};
let result = new IssueCountDto();
result.init(data);
return result;
}
toJSON(data?: any) {
data = typeof data === 'object' ? data : {};
data["count"] = this.count;
data["status"] = this.status;
return data;
}
#endregion I dont want to generate this
}
any suggesstion?