How to get InVertex and OutVertex of an edge without annotations?

[Alexandr Porunov]

Hello,

I cannot use Annotations right now. I have a simple edge:


public class Knows extends AbstractEdgeFrame {
}


I would like to be able to retrieve InVertex and OutVertex from this edge.

I.e. something like this:


Knows knows = person.getFriend();
Person friend = knows.getInVertex() // or getFriendVertex();


There is no getInVertex of course, but I would like to make such method without using @InVertex annotation. Is it possible?

Best regards,
Alexandr