Scheduling question

I have a dependencies section that looks like:

      graph = """
        st_archive<member>[-P1W] => get_data => build_model => run_family:finish-all
        run<member> => st_archive<member> => postprocess<member>

And I need to add another process ‘dispose’ that will run after all the postprocess members are complete, is there a way to do this without creating a postprocess family?

Actually it turned out to be easier than I thought it would be to make a postprocess_family and then add
postprocess_family:finish_all => dispose

There’s an example in the User Guide:
I think you just need

 postprocess<member> => dispose