if (loggerName == null) {
            return event;
        }
        for (final String name : loggerNames) {
            if (loggerName.startsWith(name)) {
                final Level sourceLevel = event.getLevel();
                if (sourceLevel != Level.ERROR) {
                    return event;
                }
                return new Log4jLogEvent.Builder(event).setLevel(Level.WARN).build();
            }
        }

              <logLevel>${gwt.logLevel}</logLevel>
              <generateJsInteropExports>true</generateJsInteropExports>
              <validateOnly>true</validateOnly>
              <sourceLevel>1.8</sourceLevel>
              <!--
                To avoid "java.io.IOException: User limit of inotify watches reached" under JDK10.
                Presumably we don't need inotify, since we don't intend to change files during the