in src/main/java/org/apache/sling/commons/metrics/internal/MetricWebConsolePlugin.java [388:422]
    private void addGaugeDetails(PrintWriter pw, SortedMap<String, Gauge> gauges) {
        if (gauges.isEmpty()) {
            return;
        }
        pw.println("<br>");
        pw.println("<div class='table'>");
        pw.println("<div class='ui-widget-header ui-corner-top buttonGroup'>Gauges</div>");
        pw.println("<table class='nicetable' id='data-gauges'>");
        pw.println("<thead>");
        pw.println("<tr>");
        pw.println("<th class='header'>Name</th>");
        pw.println("<th class='header'>Value</th>");
        pw.println("</tr>");
        pw.println("</thead>");
        pw.println("<tbody>");
        String rowClass = "odd";
        for (Map.Entry<String, Gauge> e : gauges.entrySet()) {
            Gauge g = e.getValue();
            String name = e.getKey();
            pw.printf("<tr class='%s ui-state-default'>%n", rowClass);
            pw.printf("<td>%s</td>", name);
            pw.printf("<td>%s</td>", g.getValue());
            pw.println("</tr>");
            rowClass = "odd".equals(rowClass) ? "even" : "odd";
        }
        pw.println("</tbody>");
        pw.println("</table>");
        pw.println("</div>");
    }