code: public void setFlashAsset(com.google.api.ads.admanager.axis.v201805.CreativeAsset flashAsset) {
          this.flashAsset = flashAsset;
      }
docs: Sets the flashAsset value for this BaseFlashCreative.
  
  @param flashAsset   * The flash asset. This attribute is required. To view the Flash
  image, use the
  {@link CreativeAsset#assetUrl}.