how to handle constants?

[chrisdrackett]

I'm currently migrating my react mapkit library to typescript from flow and I'm trying to use your typings instead of the flow typings I had written originally.

One thing that I'm not sure about the best way to handle is the constants provided by mapkit (map type, or FeatureVisibility as examples).

I could change these to just be normal strings but if possible a user should be required to pass in something like mapkit.FeatureVisibility.Adaptive? I'm fairly new to typescript so any suggestions are super helpful!