this is not as good as phpstan/phpstan-src#769 (e.g. array_key_first()/array_key_last() aren't covered by this, nor is array_rand()) but it does eliminate the most infuriating cases where this usually crops up.
this interface is just about the most pointless code in all of PM or Bukkit. In over 4 million lines of code on Poggit, a Google search and a GitHub search, I didn't find a single usage of it that wasn't just bukkit internals code copy pasta, a spoon, a port of PM/Bukkit/whatever into a different language, or someone's generated javadoc.
