code: def run():
      
      plugin_list = load_plugins()
  
      module = sys.modules['__main__']
      plugin_list.insert(0, ObjectSupplier(module))
  
      return run_with_plugins(plugin_list)
docs: Run all the test classes in the main module.
  
      Returns: exit code as an integer.
          The default behaviour (which may be overridden by plugins) is to return a 0
          exit code if the test run succeeded, and 1 if it failed.