@DataBoundConstructor
 public TestTrendChart(
     String name, int graphWidth, int graphHeight, String display, int dateRange, int dateShift) {
   super(name);
   this.graphWidth = graphWidth;
   this.graphHeight = graphHeight;
   this.dateRange = dateRange;
   this.dateShift = dateShift;
   this.displayStatus = display != null ? DisplayStatus.valueOf(display) : DisplayStatus.ALL;
   DashboardLog.debug("TestTrendChart", "ctor");
 }
 public void setDisplayStatus(String s) {
   displayStatus = DisplayStatus.valueOf(s);
 }