text: /*
   * Copyright Red Hat Inc. and/or its affiliates and other contributors
   * as indicated by the authors tag. All rights reserved.
   *
   * This copyrighted material is made available to anyone wishing to use,
   * modify, copy, or redistribute it subject to the terms and conditions
   * of the GNU General Public License version 2.
   * 
   * This particular file is subject to the "Classpath" exception as provided in the 
   * LICENSE file that accompanied this code.
   * 
   * This program is distributed in the hope that it will be useful, but WITHOUT A
   * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE.  See the GNU General Public License for more details.
   * You should have received a copy of the GNU General Public License,
   * along with this distribution; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   * MA  02110-1301, USA.
   */
  class SummableImpl() satisfies Summable<SummableImpl> {
  
      shared actual SummableImpl plus(SummableImpl other) {
          return nothing;
      }
  }