code: function (collection, options, callback) {
          var chosenConverter = this.getConverter(options.inputVersion, options.outputVersion);
  
          if (!chosenConverter) {
              return callback(new Error('no conversion path found'));
          }
  
          return chosenConverter.convert(collection, options, callback);
      }
docs: Picks the appropriate converter and converts the given collection.
  
  @param {Object} collection - The collection to be converted.
  @param {Object} options - The set of options for request conversion.
  @param {Function} callback - The function to be invoked after the completion of conversion process.