Caching has wrong documentation or missing methods in code

[Gamesh]

http://www.smarty.net/docs/en/caching.tpl

there are examples provided how to set cache life time and compile check.

$smarty->setCompileCheck(false);

$smarty->setCacheLifetime(30); // 30 seconds

but those methods don't exist in Smarty class.
checked in smarty v3.1.21

[Gamesh]

also the same is true about setCaching method

$smarty->setCaching(Smarty::CACHING_LIFETIME_SAVED);

[uwetews]

Not implemented setter/getter will map by generic function to the properties.
All common setters are hard coded since 3.1.23