code: private void writeFieldInstEnd(OutputStream result) throws IOException 
      {
          if(fieldAlt) {
              result.write(DELIMITER);
              result.write(FIELD_ALT);
          }
          result.write(CLOSE_GROUP);
      }
docs: Writes the end of the field instruction area.
  
  @param result The <code>OutputStream</code> to write to.