MethodExitJoinPoint is a CodeJoinPoint that corresponds
to the termination of the execution of a method. The
taget of a methodEntryJoinpoint (as obtained by getTarget)
and the object being executed (as obtained by getThis)
are the same object.
Modify the return value of this method. For primitive
types, use corresponding wrapper objects.
throws: JVMAIRuntimeException - for type mismatches between the return type andthe type of result.