how can draw the custom layer data on the map by mbgl::painter ?

[zochunhua]

I have some json layer data , like

{
"type": "FeatureCollection",
"features": [
{
"geometry": {
"type": "Point",
"coordinates": [
116.21000836585,
39.327215323
]
},
"type": "Feature",
"properties": {
"hello": "beijing"
}
}
]
}

how can draw the layer data on the map by mbgl::painter ?
please give some example?

[jfirebaugh]

GeoJSON data overlays are not currently possible, but we're working on it. See previous issues like #507 and #893.