public function hmset($key)
{
$set = $this->getKey($collection, $key, []);
$args = func_get_args();
for ($i = 1; $i < count($fields); $i++) {
$field = $args[$i];
$value = isset($args[$i + 1]) ? $args[$i + 1] : null;
$set[$field] = $value;
$i = $i + 1;
}
$this->setKey($collection, $key, $set);
}