Get current session for web project from plugin?

I tried to get session reference for current session in a plugin to do some new Web stuff.
But how?

I tried REALLoadFrameworkMethod with “Session as WebSession”.
Later I found it may be (private API call, removed)

, but that won’t load, too.

Anyone has an idea?

Maybe @Greg_O_Lone or @William_Yu know a way?
Otherwise I have a feedback case for this wish: Feedback 61615