[ASPNETCORE] Nullable custom valuetypes

[leonluc-dev]

Currently I have a custom type declared as such:

"typeMappings": {
    "string+my-custom-value-type": "MyCustomValueType"
}

MyCustomValueType is a struct (e.g. value type).

In non-nullable context the type is generated as expected:

"exampleProperty": {
  "type": "string",
  "format": "my-custom-value-type"
}

public MyCustomValueType ExampleProperty { get; set; }

But whenever I define a property as nullable the generated property is missing the explicit ? (nullable) suffix required for value types.

OpenAPI spec:

"exampleProperty": {
  "type": "string",
  "format": "my-custom-value-type",
  "nullable": true
}

public MyCustomValueType ExampleProperty { get; set; }

Expected:

public MyCustomValueType? ExampleProperty { get; set; }

Is there a way to tell the (aspnetcore) generator to treat a custom type as a value type?