code: def process(self, *args, **kwargs):
          
          self._clear_dead_entities()
          self._process(*args, **kwargs)
docs: Call the process method on all Processors, in order of their priority.
  
          Call the *process* method on all assigned Processors, respecting their
          optional priority setting. In addition, any Entities that were marked
          for deletion since the last call to *World.process*, will be deleted
          at the start of this method call.
  
          :param args: Optional arguments that will be passed through to the
          *process* method of all Processors.