RevitPlane to DynamoPlane conversion

Hi, guys and gerls.
Tell me please where is my problem?
I am trying to convert RevitPlane to DynamoPlane using ToProtoType() method and it is not working. Why?
As i understand from this post: it can’t be making directly. Only by vector and points conversion. Am i right?

I haven’t had a chance to look into this, but if you wrap the Revit plane, it’s easy to extract a Dynamo plane from that with “SketchPlane.Plane” :