B4J Question Is there a Rapid Debugger in B4J

I have been using B4J since it has come out an developed at least 7 programs.
I have not seen a Rapid Debugger in the program is there one?

This question is related to recent assistance I tried to provide.

http://www.b4x.com/android/forum/threads/b4j-tutorial-for-basic4android-developers.34659/page-2

Fine tuning my knowledge of anywhere software. Thank you.