code: public com.google.api.ads.adwords.axis.v201809.cm.CustomParameters getAppUrlCustomParameters() {
          return appUrlCustomParameters;
      }
docs: Gets the appUrlCustomParameters value for this AppFeedItem.
  
  @return appUrlCustomParameters   * A list of mappings to be used for substituting URL custom parameter
  tags in the
  trackingUrlTemplate, finalUrls, and/or finalMobileUrls.