/** Deletes a campaign feed. */
  private static CampaignFeed deleteCampaignFeed(
      AdWordsServices adWordsServices, AdWordsSession session, CampaignFeed campaignFeed)
      throws Exception {
    // Get the CampaignFeedService.
    CampaignFeedServiceInterface campaignFeedService =
        adWordsServices.get(session, CampaignFeedServiceInterface.class);

    CampaignFeedOperation operation = new CampaignFeedOperation();
    operation.setOperand(campaignFeed);
    operation.setOperator(Operator.REMOVE);

    return campaignFeedService.mutate(new CampaignFeedOperation[] {operation}).getValue(0);
  }