code: public void setSortColumns(java.util.Collection<Order> sortColumns) {
          if (sortColumns == null) {
              this.sortColumns = null;
              return;
          }
  
          this.sortColumns = new java.util.ArrayList<Order>(sortColumns);
      }
docs: <p>
  A list specifying the sort order of each bucket in the table.
  </p>
  
  @param sortColumns
  A list specifying the sort order of each bucket in the table.