code: function readPolygonGeometry(object, arcs) {
    const coordinates = [];
    for (let i = 0, ii = object['arcs'].length; i < ii; ++i) {
      coordinates[i] = concatenateArcs(object['arcs'][i], arcs);
    }
    return new Polygon(coordinates);
  }
docs: Create a polygon from a TopoJSON geometry object.
  
  @param {TopoJSONPolygon} object TopoJSON object.
  @param {Array<Array<import("../coordinate.js").Coordinate>>} arcs Array of arcs.
  @return {Polygon} Geometry.