I have a JSON document that I want to index into Hbase.   { "field1" : { "nestedfield" : "value1" } "field2" : "value2" }   In this case I want `nestedfield` to be the one used as a row identifier field, but I can't figure out how to specify this to the `PutHBaseJson` processor. I have tried multiple ways : - field1/nestedfiled - field1['nestedfiled'] - field1.nestedfield - $.filed1.nestedfiled None of them are working, the processor is saying that "the Row ID was null". Using `field2` for this purpose is working fwiw. ... View more