docs: function increment(value, skip, incrementBy) {
      var str = (typeof value === 'string');
      var incrementBy = incrementBy || 1;
      var numeric = !isNaN(value);
      var skip = skip || [];
      var nextVal;
  
      if (numeric) {
          value = parseInt(value) + parseInt(incrementBy);
      } else {
          value = String.fromCharCode(value.charCodeAt(0) + parseInt(incrementBy));
      }
  
      if (str) value = value.toString();
      if (skip.indexOf(value) === -1) return value;
      return increment(value, skip, incrementBy);
  }