need to provide a hook method invokded on com.sun.javatest.exec.ContextManager objects when the corresponding tab gets closed.
This would be very useful to cleanup the ContextManager and all the associated objects.
I suggest to add method
com.sun.javatest.exec.ContextManager#dispose()
and just invoke it from
com.sun.javatest.exec.ExecTool#dispose().
This method should not be final to allow to override it in the ContextManger subclasses.