What is nc_ikra in CMS NetCat, PHP?

Question

Netcat CMS

I'm trying to fix one site, there is always a mention in the code about nc_ikra. As far as I understand, this is something like a library, I tried to google it, it did not save

An example of such a code

if ($fav && $AUTH_USER_ID) {
    if ($fav > 0) {
@nc_Ikra::insert_row("Favorites", array(
'User_ID' => $AUTH_USER_ID,
'Message_ID' => $message,
'Class_ID' => $classID
));