protected function lib_index($args)
{
list($list, $value) = $args;
$list = $this->assertList($list);
$values = array();
foreach ($list[2] as $item) {
$values[] = $this->normalizeValue($item);
}
$key = array_search($this->normalizeValue($value), $values);
return false === $key ? false : $key + 1;
}