docs: function importMatchItem(i, j, item, map, miss) {
          if ('number' === typeof item) {
              return 'undefined' !== typeof map[item] ? map[item] : miss;
          }
          else if ('string' === typeof item) {
              return item;
          }
          throw new TypeError('Matcher.match: items can be only string or ' +
                              'number. Found: ' + item + ' at position ' +
                              i + ',' + j);
      }