code: public void setCreativeFormat(com.google.api.ads.admanager.axis.v201902.RichMediaStudioCreativeFormat creativeFormat) {
          this.creativeFormat = creativeFormat;
      }
docs: Sets the creativeFormat value for this BaseRichMediaStudioCreative.
  
  @param creativeFormat   * The creative format of the Rich Media Studio creative. This
  attribute is readonly.