An operation with a required IFormFile is not treated as non-nullable parameter

An operation with a required IFormFile is not treated as non-nullable parameter

Requirements:

Asp.Net Core 6.0.9 NSwagStudio v13.16.1.0 Important: Nullable Refeence Types enabled on client.

How to reproduce:

On server side, (asp.net core 6), add a controller action like this:

    [HttpPost]
    public ActionResult CreateFile([BindRequired] IFormFile file) {
      return Ok();
    }

When generating client code via NSwagStudio, a method like this is generated:

    Task Post(FileParameter file = null);

I have enabled Nullable Reference Types, so this warning is generated: warning CS8625: Cannot convert null literal to non-nullable reference type.

Expected result

With Nullable Reference Types enabled, no default value for file parameter is expected, because it is required. This is not a problem with other normal actions, where Required/BindRequired parameters or models are treated as non-nullable non-default correctly.