ActivityBehavior missing from api docs?

[cda]

I was reading the user guide and seeing a reference to an interface called ActivityBehavior.  This interface is supposed to be useful in executing code in custom Java classes, but I don't see this interface in the API docs.  Is this interface deprecated?  Is this interface just missing from the API docs?  I was looking for

    org.activiti.engine.impl.pvm.delegate.ActivityBehavior

mentioned on the org.activiti.engine.delegate.JavaDelegate page.  I don't see the package or.activiti.engine.impl  either. 

Thank you for your help.

Clark

[cda]

Ahhh.  I just opened the ActivitiEngine sources jar.  The class is there, but it has no javadoc on it yet.  So I answered the question.  The javadoc is missing for this interface.