code: public function process(Pipeline\Pipeline $pipeline, $payload)
  	{
  		$runner         = clone($this);
  		$runner->stages = $pipeline->getIterator();
  
  		return $runner->handle($payload);
  	}
docs: Process the payload
  
  Returns this with the stages set
  
  @param Pipeline\Pipeline $pipeline
  @param                   $payload
  @return mixed|ResponseInterface