} catch (VisitorException e) {
LOG.warn("Feature visitor failed", e);
}
}
StringBuilder sb = new StringBuilder();
for (int i=feature.nextSetBit(0); i>=0; i=feature.nextSetBit(i+1)) {
if (sb.length() > 0) sb.append(",");
sb.append(PIG_FEATURE.values()[i].name());
}
retStr = sb.toString();
featureMap.put(mro, retStr);