code: def update_campaign_metadata_retrieve(self, campaign_id, campaign_device_metadata_id, **kwargs):  # noqa: E501
          
          kwargs['_return_http_data_only'] = True
          if kwargs.get('asynchronous'):
              return self.update_campaign_metadata_retrieve_with_http_info(campaign_id, campaign_device_metadata_id, **kwargs)  # noqa: E501
          else:
              (data) = self.update_campaign_metadata_retrieve_with_http_info(campaign_id, campaign_device_metadata_id, **kwargs)  # noqa: E501
              return data
docs: Get a campaign device metadata  # noqa: E501
  
          Get update campaign metadata.  # noqa: E501
          This method makes a synchronous HTTP request by default. To make an
          asynchronous HTTP request, please pass asynchronous=True
          >>> thread = api.update_campaign_metadata_retrieve(campaign_id, campaign_device_metadata_id, asynchronous=True)
          >>> result = thread.get()
  
          :param asynchronous bool
          :param str campaign_id: The update campaign ID (required)
          :param str campaign_device_metadata_id: The campaign device metadata ID (required)
          :return: CampaignDeviceMetadata
                   If the method is called asynchronously,
                   returns the request thread.