docs: function hmset(key /* field-1, value-1, field-N, value-N, req */) {
    var args = slice.call(arguments, 1)
      , req = typeof args[args.length - 1] === 'object'
          ? args.pop() : null
      , val = this.getKey(key, req)
      , i;
  
    if(!val) {
      val = new HashMap();
      this.setKey(key, val, undefined, undefined, undefined, req);
    }
    for(i = 0;i < args.length;i+=2) {
      val.setKey(args[i], args[i + 1]);
    }
    return OK;
  }