code: function decode(callback) {
      if (typeof callback == 'function') {
        return callback;
      } else {
        var split = callback.split('::');
        var action = split[0];
        var method = split[1] || 'index';
        return {
          action: action,
          method: method,
          arguments: []
        };
      }
    }
docs: Decode callback
  @param callback
  @returns {*}