Performance Lighting and Cam for Gamemaker 2

Does it cast shadows?

** Is it possible to set feathering/softness around the edges of lights (eg. around the sharp torchlight, etc)?

** Can this "engine" be intergrated into our own games easily, or do we need to move our game into this "engine" instead?

** Is everything commented?

** Is there a Youtube tutorial for using it? 

** Any documentation?

Thanks.