reverse() {
        for (let face of this.faces) {
            face.reverse();
        }
        return this;
    }
/**
     * Reverse orientation of all faces to opposite
     * @returns {Polygon}
     */
Reverse orientation of all faces to opposite
@returns {Polygon}
Reverse orientation of all faces to opposite @returns { Polygon }
reverse() {
        for (let face of this.faces) {
            face.reverse();
        }
        return this;
    }
reverse ( ) { for ( let face of this . faces ) { face . reverse ( ) ; } return this ; }
Reverse orientation of all faces to opposite
 @returns {Polygon}
Reverse orientation of all faces to opposite @returns { Polygon }