code: public com.google.api.ads.admanager.axis.v201811.DeviceCategoryTargeting getDeviceCategorySegment() {
          return deviceCategorySegment;
      }
docs: Gets the deviceCategorySegment value for this ProductSegmentation.
  
  @return deviceCategorySegment   * The device category segmentation. {@link DeviceCategoryTargeting#excludedDeviceCategories}
  must
  be empty or null.
  
  <p>This attribute is optional.