docs: function convertData(dataObject) {
          var dataVersion = dataObject.__v || '0.0.0',
              majorDataVersion = dataVersion.split('.')[0];
  
          if (majorDataVersion > MAJOR_APP_VERSION) {
              throw new Error('Trying to load data of incompatible version. Current version "' +
                  APP_VERSION + '", data version "' + dataVersion + '".');
          }
  
          if (dataVersion !== APP_VERSION &&
              dataConverters[dataVersion] &&
              typeof dataConverters[dataVersion][APP_VERSION] === 'function') {
  
              return dataConverters[dataVersion][APP_VERSION](JSON.parse(JSON.stringify(dataObject)));
          }
  
          return dataObject;
      }