code: function get( obj ) {
    var pending = 0
      , res     = {}
      , callback
      , done;
  
    return function _( arg ) {
      switch(typeof arg) {
        case 'function':
          callback = arg;
          break;
        case 'string':
          ++pending;
          obj[ arg ](function( err, val ) {
            if( done ) return;
            if( err ) return done = true, callback(err);
            res[ arg ] = val;
            --pending || callback(null, res);
          });
          break;
      }
      return _;
    };
  }
docs: Data fetching helper.