No labels display in simple renderer

[jcbridwe]

In the geojsonlayer.html file, I see there is commented out code for the simple renderer. I just want to add a label to display with my layer. The below code doesn't seem to work out of the box for the "label" attribute; no label displays. Is there something else I need to do here?
```
//Optional SimpleRenderer if you don't want a random symbol and color
var simpleJson = {
"type": "simple",
"label": "labels",
"description": "A bunch of stuff about layers",
"symbol": {
"color": [210,105,30,191],
"size": 10,
"angle": 0,
"xoffset": 0,
"yoffset": 0,
"type": "esriSLS" // esriSMS, esriSLS
}
};
geoJsonLayer.renderer = new SimpleRenderer(simpleJson);