code: function getMeasureStations(latitude, longitude, params, callback) {
      if(!latitude || !longitude) {
        callback(new Error("WaterFlow.getMeasureStations: latitude and longitude required"));
        return;
      }
      params = params || {};
      params.latitude = latitude;
      params.longitude = longitude;
      core.callApi('/waterflowservice/GetMeasureStations', params, callback);
    }
docs: Returns a list of all available measure stations producing water level data.
  
  @memberof module:gbgcity/WaterFlow
  @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 {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/WaterFlowService/help/operations/GetMeasureStations