legendsTitleAlignment

Cannot define a resource version for enum properties (?).

We could have accepted a style resource and then extract the attribute value related to this enum property but that was dirty:

<style name="CustomLegendsTitleAlignmentStyle">
  <item name="legendsTitleAlignment">start</item>
</style>

In addition, in the future we can define a property named chartStyle that accepts a style resource id and applies it to all the properties of the chart instead of just a single enum property.

See the commented EnumResource class in Properties.kt file.