code: def stage(self, pipeline_name, stage_name, pipeline_counter=None):
          
          return Stage(self, pipeline_name, stage_name, pipeline_counter=pipeline_counter)
docs: Returns an instance of :class:`Stage`
  
          Args:
              pipeline_name (str): Name of the pipeline the stage belongs to
              stage_name (str): Name of the stage to act on
              pipeline_counter (int): The pipeline instance the stage is for.
  
          Returns:
            Stage: an instantiated :class:`Stage`.