Joomla 3.x find code for SECOND string of hash hex digits while creating cache file Topic is solved

[Sarge_2022]

Hello to Joomla Community !
My environment - CentOS 7, PHP 7.4, Joomla 3.9.28 with enabled native Joomla cache plugin and Global Configuration -> System -> Cache Handler -> File - path /cache
So cache files created under /cache/page/ looks like
d6ce7bd2b5485ba575657fa6cfd878dc-cache-page-2309b00ab41ee13659dcb835b1a1b484.php
as per Joomla documentation "second string of hex digits is a hash of the URL of the site web page, to make the filename unique to that page"
I suppose every cache file has created by native Joomla plugin
/plugins/system/cache/cache.php
But I cannot find a part of code what creates SECOND STRING of HASH in cache file name as above underlined - 2309b00ab41ee13659dcb835b1a1b484
Please, advise - where I could find this part of code ?
(I'd like to write a small improvement to store these unique hash of cache file in MySQL database for my own purposes - but WHAT creates this hash ? )

[SharkyKZ]

It's created in Joomla\CMS\Cache\CacheStorage::_getCacheId() method.

[Sarge_2022]

Thanks a lot ! You already gave me the right direction.

[Sarge_2022]

It's created in Joomla\CMS\Cache\CacheStorage::_getCacheId() method.

Thanks a lot ! You already gave me the right direction.
If you could just say me is it possible to call the function as a variable like
$cid = JFactory::_getCacheId();
or with other syntax ?
...IDEALLY if I could add such a variable to
/plugins/system/cache/cache.php
where
// Saves current page in cache.
$this->_cache->store($this->app->getBody(), $this->getCacheKey());
$cid = JFactory::_getCacheId();
if it's possible

[SharkyKZ]

No, not normally. It's a protected method.