Can't find NavMeshGenerator

I can’t find the NavMeshGenerator class. Although I’m very derpi, I’ve downloaded and added the jme3-ai library to the project. (Auto Update is on)
Thank you for help,

Its a function in the SceneComposer, right-click a geometry or node to create it.

I know, but I want to generate a navmesh in runtime.

Its an external library

Thanks, i’ve just figured this out, too. (Thanks Monkeyzone).