if (t.get() && *t.get()) {
log.info("building MetadataFilter of type %s", t.get());
m_filters.push_back(conf.MetadataFilterManager.newPlugin(t.get(),child));
if (t.get() && *t.get()) {
log.info("building MetadataFilter of type %s", t.get());
m_filters.push_back(conf.MetadataFilterManager.newPlugin(t.get(),child));