docs: function hmget(key /* field-1, field-N, req */) {
    var args = slice.call(arguments, 1)
      , req = typeof args[args.length - 1] === 'object'
          ? args.pop() : null
      , val = this.getKey(key, req)
      , value
      , list = []
      , i;
    for(i = 0;i < args.length;i++) {
      if(!val) {
        list.push(null);
        continue;
      }
      value = val.getKey(args[i])
      list.push(value !== undefined ? value : null);
    }
    return list;
  }