code: def process(self, plugin, instance=None, action=None):
          
  
          plugin_obj = self.__plugins[plugin["id"]]
          instance_obj = (self.__instances[instance["id"]]
                          if instance is not None else None)
  
          result = pyblish.plugin.process(
              plugin=plugin_obj,
              context=self._context,
              instance=instance_obj,
              action=action)
  
          return formatting.format_result(result)
docs: Given JSON objects from client, perform actual processing
  
          Arguments:
              plugin (dict): JSON representation of plug-in to process
              instance (dict, optional): JSON representation of Instance to
                  be processed.
              action (str, optional): Id of action to process