info.setSourceLocator(this.getSourceLocator());
info.setProperty("label", label);
info.setProperty("value", val);
TraceListener listener = LogController.getTraceListener();
listener.enter(info, context);
listener.leave(info);
}
public static void traceItem(/*@Nullable*/ Item val, String label) {
if (val==null) {
logger.info(label + ": empty sequence");