
i add the Gantt control and i added (GanttControlMilestoneMarker) but not appear into Gantt control
GanttControlMilestoneMarker marker = new GanttControlMilestoneMarker();
// GanttControlMilestoneActivity
marker.parmId(groupActiveId);
marker.parmFromDateTime(DateTimeUtil::newDateTime(str2Date('30/1/2022',123),str2Time(strTime)));
marker.parmText('Test for apps');
marker.parmSymbolName('');
marker.parmColor(29439);
i want to know (parmSymbolName) how to get the symbol name