GeoJSON MultiPolygon to Google Maps Polygon

// A MultiPolygon for German borders
// see http://www.naturalearthdata.com/
var coordinates = [[[[6.743,53.578],[6.75,53.572],[6.757,53.563],[6.748,53.566],[6.735,53.575],[6.727,53.577],[6.716,53.576],[6.702,53.571],[6.696,53.57],[6.678,53.575],[6.664,53.587],[6.66,53.599],[6.672,53.604],[6.748,53.618],[6.785,53.62],[6.799,53.604],[6.776,53.602],[6.741,53.593],[6.723,53.591],[6.723,53.584],[6.734,53.582],[6.743,53.578]]],[[[7.086,53.687],[6.874,53.672],[6.911,53.683],[7.048,53.694],[7.086,53.687]]]]; // incomplete

var paths = _.map(coordinates, function(entry) {
    return _.reduce(entry, function(list, polygon) {
        // This map() only transforms the data.
        _.each(_.map(polygon, function(point) {
            // Important: the lat/lng are vice-versa in GeoJSON
            return new google.maps.LatLng(point[1], point[0]);
        }), function(point) {
            list.push(point);
        });

        return list;
    }, []);
});

var polygon = new google.maps.Polygon({
    paths: paths,
});

// given "map" is defined, this will display the polygon on the map
polygon.setMap(map);