As with other special cases, this depends on the property name.
The UIDimension code is kept separate since it can handle both integers
and strings, and the string names for special dimensions don't match
with the enum names.
This does the exact same thing as the runtime initializer,
except it is faster and can catch some errors much earlier.
The code generator includes these important features:
- Automatic include generation where necessary
- Special-casing for TabWidget and ScrollableContainerWidget
- No use of DeprecatedString where possible
