code: function getParkings(latitude, longitude, radius, type, params, callback) {
      if(!latitude || !longitude || !radius) {
        callback(new Error("Parking.getParkings: latitude, longitude and radius required"));
        return;
      }
      params = params || {};
      params.latitude = latitude;
      params.longitude = longitude;
      params.radius = radius;
      var subResource;
      switch(type) {
        case 'bus': subResource = 'BusParkings';
          break;
        case 'handicap': subResource = 'HandicapParkings';
          break;
        case 'mc': subResource = 'MCParkings';
          break;
        case 'private': subResource = 'PrivateParkings';
          break;
        case 'publicTime': subResource = 'PublicTimeParkings';
          break;
        case 'publicToll': subResource = 'PublicTollParkings';
          break;
        case 'residential': subResource = 'ResidentialParkings';
          break;
        case 'truck': subResource = 'TruckParkings';
          break;
        default:
          callback(new Error("Parking.getParkings: unknown type: " + type));
      }
      core.callApi('/ParkingService/v1.0/' + subResource, params, callback);
    }
docs: Returns all public parkings of the given type.
  
  @memberof module:gbgcity/Parking
  @param {String|Number} latitude The latitude of the location around which to explore.
  @param {String|Number} longitude The longitude of the location around which to explore.
  @param {String|Number} radius The radius of the area to explore.
  @param {String} type The parking type. Any of: bus, handicap, mc, private, publicTime, publicToll, residential, truck
  @param {Object} [params] An object containing additional parameters.
  @param {Function} callback The function to call with results, function({Error} error, {Object} results)/
  @see http://data.goteborg.se/ParkingService/v1.0/help/operations/GetBusParkings and similar