public ILocatedOpenApiElement <OpenApiMediaType>?Select(ILocatedOpenApiElement <OpenApiResponse> response) =>
 response
 .GetMediaTypes()
 .FirstOrDefault(p => p.Key == "application/json");
 public ILocatedOpenApiElement <OpenApiMediaType>?Select(ILocatedOpenApiElement <OpenApiRequestBody> requestBody) =>
 requestBody
 .GetMediaTypes()
 .FirstOrDefault(p => p.Key == "application/json");
 public ILocatedOpenApiElement <OpenApiMediaType>?Select(ILocatedOpenApiElement <OpenApiResponse> response) =>
 response
 .GetMediaTypes()
 .Select(mediaType => (mediaType, descriptor: _serializerSelector.Select(mediaType)))