MaybeUndefined does not add the nullable Attribute

[tooboredtocode]

Expected Behavior

The MaybeUndefined Enum should add the nullable Attribute to indicate that this value may be null, in addition to being optional.

Actual Behavior

The MaybeUndefined Enum does not add the Attribute as expected.

Steps to Reproduce the Problem

1. Create an Object with a MaybeUndefined field
2. Run the server to create the docs
3. The Object's field is not marked as nullable

Specifications

Not Applicable