code: @UiThread
    public List<Fill> create(@NonNull String json) {
      return create(FeatureCollection.fromJson(json));
    }
docs: Create a list of fills on the map.
  <p>
  Fills are going to be created only for features with a matching geometry.
  <p>
  All supported properties are:<br>
  FillOptions.PROPERTY_FILL_OPACITY - Float<br>
  FillOptions.PROPERTY_FILL_COLOR - String<br>
  FillOptions.PROPERTY_FILL_OUTLINE_COLOR - String<br>
  FillOptions.PROPERTY_FILL_PATTERN - String<br>
  Learn more about above properties in the <a href="https://www.mapbox.com/mapbox-gl-js/style-spec/">Style specification</a>.
  <p>
  Out of spec properties:<br>
  "is-draggable" - Boolean, true if the fill should be draggable, false otherwise
  
  @param json the GeoJSON defining the list of fills to build
  @return the list of built fills