old_contents: from volgenmodel import *
  
  workflow = make_workflow()
  workflow.run(plugin='MultiProc', plugin_args={'n_procs' : 2})
  
new_contents: from volgenmodel import *
  
  workflow = make_workflow()
  workflow.run(plugin='MultiProc', plugin_args={'n_procs' : 4})
  
subject: Update go.py