question to building cube from kafka

[Jie Tao]

It is a nice feature to build cube directly from kafka. From the example 
on your docs I see that the table schema is extracted from the input 
JSON. The question is: do your support recursive JSON structure, i.e., a 
JSON attribute is an object containing other attributes? Like:

{
"foo": {
    "attr1": 70,
    "att2: "blabla"
},
"fa":....
}
Cheers,

Jie