code: function defaultColor(colorString, name) {
      if (colorString === undefined) {
        var color = Color.fromCssColorString(
          getRandomCssColor(standardCssColors.highContrast, name)
        );
        color.alpha = 1;
        return color;
      } else {
        return Color.fromCssColorString(colorString);
      }
    }
docs: /* Style information is applied as follows, in decreasing priority:
  - simple-style properties set directly on individual features in the GeoJSON file
  - simple-style properties set as the 'Style' property on the catalog item
  - our 'options' set below (and point styling applied after Cesium loads the GeoJSON)
  - if anything is underspecified there, then Cesium's defaults come in.
  
  See https://github.com/mapbox/simplestyle-spec/tree/master/1.1.0