function createConverter(name, func) {
    var realName = mapping.aliasToReal[name] || name,
        methodName = mapping.remap[realName] || realName,
        oldOptions = options;

    return function(options) {
      var newUtil = isLib ? pristine : helpers,
          newFunc = isLib ? pristine[methodName] : func,
          newOptions = assign(assign({}, oldOptions), options);

      return baseConvert(newUtil, realName, newFunc, newOptions);
    };
  }
Create a converter function for `func` of `name`.

@param {string} name The name of the function to convert.
@param {Function} func The function to convert.
@returns {Function} Returns the new converter function.