code: function (inputVersion, outputVersion) {
          var converter;
  
          inputVersion = semver.clean(inputVersion);
          outputVersion = semver.clean(outputVersion);
  
          for (converter in this.converters) {
              // eslint-disable-next-line no-prototype-builtins
              converter = this.converters.hasOwnProperty(converter) && this.converters[converter];
              if (converter && semver.eq(converter.input, inputVersion) && semver.eq(converter.output, outputVersion)) {
                  return generateConverter(converter);
              }
          }
      }
docs: Fetches a converter for the given input and output versions
  
  @param {String} inputVersion - The version to convert from.
  @param {String} outputVersion - The version to convert to.
  @returns {Converter} - A converter for the given set of options.