code: function getValidRegex(pattern) {
    var escaped = (0, _escapeRegexp2.default)(pattern);
  
    var _iteratorNormalCompletion = true;
    var _didIteratorError = false;
    var _iteratorError = undefined;
  
    try {
      for (var _iterator = filters[Symbol.iterator](), _step; !(_iteratorNormalCompletion = (_step = _iterator.next()).done); _iteratorNormalCompletion = true) {
        var data = _step.value;
  
        var rxp = new RegExp("\\\\\\[" + data[0] + "\\\\:[A-Za-z]{0,}?\\\\]", "g");
  
        if (rxp.exec(escaped)) {
          escaped = escaped.replace(rxp, data[1]);
        }
      }
    } catch (err) {
      _didIteratorError = true;
      _iteratorError = err;
    } finally {
      try {
        if (!_iteratorNormalCompletion && _iterator.return) {
          _iterator.return();
        }
      } finally {
        if (_didIteratorError) {
          throw _iteratorError;
        }
      }
    }
  
    return new RegExp("^" + escaped + "$", "g");
  }
docs: Return a valid, escaped regular expression from a `pattern`. A pattern should
  respect the following structure: `[filter:name?]`.
  
  @param   {string}    pattern   Pattern to convert
  @return  {RegExp}              Escaped regular expression