How can I put a nested field name while defining a data driven styling?

[agaase]

My geojson data (converted to mbtiles) has following format
"properties": { "excessTime": { "one": 123, "two" : 134 } }

I want to define a style which can style based on the fields inside excessTime; something like

'fill-color': { "property" : "excessTime.one", "type": "interval", "stops" : [ ] },
Is it possible right now with the current data driven styling API?

[jfirebaugh]

It's not possible right now; you'll need to flatten the properties in the source data. A request for nested property support in tiles is tracked in mapbox/vector-tile-spec#75.