code: public void setTargetedDeviceCategories(com.google.api.ads.admanager.axis.v201808.Technology[] targetedDeviceCategories) {
          this.targetedDeviceCategories = targetedDeviceCategories;
      }
docs: Sets the targetedDeviceCategories value for this DeviceCategoryTargeting.
  
  @param targetedDeviceCategories   * Device categories that are being targeted by the {@link LineItem}.