protected function validateIn($field, $value, $params)
{
$isAssoc = array_values($params[0]) !== $params[0];
if ($isAssoc) {
$params[0] = array_keys($params[0]);
}
$strict = false;
if (isset($params[1])) {
$strict = $params[1];
}
return in_array($value, $params[0], $strict);
}