addHandlerIfNotNull(l, dev);
Handler firebug = GWT.create(FirebugLogHandler.class);
addHandlerIfNotNull(l, firebug);
Handler system = GWT.create(SystemLogHandler.class);
addHandlerIfNotNull(l, system);
HasWidgets loggingWidget = GWT.create(LoggingPopup.class);
if (!(loggingWidget instanceof NullLoggingPopup)) {
addHandlerIfNotNull(l, new HasWidgetsLogHandler(loggingWidget));
}
}