Converting the complete response

function toGeojson(timeMapResponse) {
    // Parses the response json. This is needed if the parameter is a raw string. You don't need this if the response has already been parsed.
    var responseData = JSON.parse(timeMapResponse);
    // Converts each result in the response into a MultiPolygon object.
    var multiPolygons = responseData['results'].map(r => shapesToMultiPolygon(r['shapes']));
    // Returns a feature collection object. This can be written to a file or sent for further processing.
    return {
   	 'type': 'FeatureCollection',
   	 'features': multiPolygons
    };
}