code: function get(code) {
    if (!Object.prototype.hasOwnProperty.call(osm, code)) {
      throw new TypeError('The alpha-3 code provided was not found: ' + code);
    }
    return osm[code];
  }
docs: Converts an alpha-3 iso 3166-1 code to its corrispective relation id on OSM.
  @public
  @param  {string} code Alpha-3 iso 3166-1 country code.
  @return {string} OSM relation id of the given country.