code: protected void truncatePanel(Panel panel, String textMetricsKey, int clientWidth) {
  
          for (Widget widget : panel) {
              if (widget instanceof I_CmsTruncable) {
                  ((I_CmsTruncable)widget).truncate(textMetricsKey, clientWidth);
              }
          }
      }
docs: Truncates all children of the given panel implementing the I_CmsTruncable.<p>
  
  @param panel the panel
  @param textMetricsKey the metrics key
  @param clientWidth the client width