" import org.jbpm.graph.exe.ExecutionContext " Jbpm 3x

in the above class I couldn't find getExecutionService() method.
I have searched for that method. finally I found in "import org.jbpm.delegation.ExecutionContext (Jbpm2.0) " class.

I am using Jbpm 3.1. Where can I get this method in 3.1.

Pelase guide me.

Thanks
Jagadeesh