code: public com.google.api.ads.admanager.axis.v201808.MobileCarrierTargeting getMobileCarrierSegment() {
          return mobileCarrierSegment;
      }
docs: Gets the mobileCarrierSegment value for this ProductSegmentation.
  
  @return mobileCarrierSegment   * The mobile carrier segmentation. {@link MobileCarrierTargeting#isTargeted}
  must be {@code
  true}.
  
  <p>This attribute is optional.