Nullable enum as UntypedNode

Hello,

If i have a nullable enum property, the openApi generator write this to the Json file:

> "NullableOfGender": {
>       "enum": [
>             "Male",
>             "Female",
>             null
>       ],
>       "nullable": true
> }

So, when i consume the openApi via Kiota, it generate a "UntypedNode?".

Can you fix please?

Thanks.