docs: def modify_service(self, service_id, type):
          '''
          modify_service(self, service_id, type)
  
          | Modifies a service type (action, container, etc.)
  
          :Parameters:
          * *service_id* (`string`) -- Identifier of an existing service
          * *type* (`string`) -- service type
  
          :return: Service modification metadata (service id, type, modified date, versions
  
          :Example:
          .. code-block:: python
  
             service_modification_metadata = opereto_client.modify_service ('myService', 'container')
             if service_modification_metadata['type'] == 'container'
                print 'service type of {} changed to container'.format('myService')
  
          '''
          request_data = {'id': service_id, 'type': type}
          return self._call_rest_api('post', '/services', data=request_data, error='Failed to modify service [%s]'%service_id)