TreeStore definition in the webix.d.ts 5.4.0

Hello Webix team!

Could you tell me please, why [TreeStore] interface definition doesn’t extend the [DataStore] one?

Isn’t there pure inheritance relationship between them?

Yep, it has the sense to define them in such way.
I will check the code and if no API conflict arise, will change definition accordingly.

Thank you very much in advance!