code: def load_plugins(self):
          
          try:
              from pkg_resources import iter_entry_points
          except ImportError:
              return
          for ep in iter_entry_points(group="custodian.%s" % self.plugin_type):
              f = ep.load()
              f()
docs: Load external plugins.
  
          Custodian is intended to interact with internal and external systems
          that are not suitable for embedding into the custodian code base.