code: public com.google.api.ads.admanager.axis.v201808.MobileDeviceTargeting getMobileDeviceSegment() {
          return mobileDeviceSegment;
      }
docs: Gets the mobileDeviceSegment value for this ProductSegmentation.
  
  @return mobileDeviceSegment   * The mobile device segmentation. {@link MobileDeviceTargeting#excludedMobileDevices}
  must be
  empty or null.
  
  <p>This attribute is optional.