code: public com.google.api.ads.adwords.axis.v201809.cm.CustomParameters getUrlCustomParameters() {
          return urlCustomParameters;
      }
docs: Gets the urlCustomParameters value for this Ad.
  
  @return urlCustomParameters   * A list of mappings to be used for substituting URL custom parameter
  tags in the
  trackingUrlTemplate, finalUrls, and/or finalMobileUrls.
  <p>This field is used for upgraded urls only, as described at:
  https://developers.google.com/adwords/api/docs/guides/upgraded-urls
  <span class="constraint Selectable">This field can be selected using
  the value "CreativeUrlCustomParameters".</span><span class="constraint
  Filterable">This field can be filtered on.</span>