code: public com.google.api.ads.admanager.axis.v201808.MobileDeviceSubmodelTargeting getMobileDeviceSubmodelSegment() {
          return mobileDeviceSubmodelSegment;
      }
docs: Gets the mobileDeviceSubmodelSegment value for this ProductSegmentation.
  
  @return mobileDeviceSubmodelSegment   * The mobile device submodel segmentation. {@link
  MobileDeviceSubmodelTargeting#excludedMobileDeviceSubmodels}
  must be empty or null.