use fieldRef instead of just name
use fieldRef instead of just name

vega/vega-lite,uwdata/vega-lite,uwdata/vega-lite,ellisonbg/vega-lite,vega/vega-lite,vega/vega-lite,uwdata/vega-lite,vega/vega-lite,uwdata/vega-lite,vega/vega-lite,ellisonbg/vega-lite,ellisonbg/vega-lite,uwdata/vega-lite