version: Magnesium
page: developer-guide/yang-tools

The last for points (Introducing schema source repositories
Writing YANG driven generators
Introducing specific extension support for YANG parser
Diagnostics) are completely missing.

If I'm not mistaken it also supports more than just RFC6020 though it states only that.

In the code examples all the "=" signes are doubled and the ones I tried had missing classes (or maybe I just missed a dependency).