if (omitVisitors == null) {
log.debug("omitVisitors is null");
return;
}
List<String> detectorsList = Arrays.asList(StringUtils.split(omitVisitors, ","));
final DetectorFactoryCollection dfc = DetectorFactoryCollection.instance();
for (String d : detectorsList) {
final DetectorFactory df = dfc.getFactory(d);
if (df == null) {
log.error(String.format("[%s]: IGNORING unknown detector [%s]", LOG_PREFIX, d));
} else {
prefs.enableDetector(df, false);
}