if (columnsJson == null)
return true;
HNode hn = headers.getParentHNode();
if (hn != null) {
HNodePath hPath = hn.getHNodePath(factory);
String path = hPath.toColumnNamePath() + "/" + key;
Boolean b = columnsCache.get(path);
if (b != null)
return b;
HNode first = null;
JSONArray t = columnsJson;