src/includes/classes/Core/Utils/Serializer.php
public function unserializeClosure(string $string, bool $faster = false): \Closure
    {
        if (mb_strpos($string, $this::CLOSURE) === 0) {
            $string = mb_substr($string, mb_strlen($this::CLOSURE));
        }
        return $this->{$faster ? 'ClosureTokenSerializer' : 'ClosureAstSerializer'}->unserialize($string);
    }
public function unserializeClosure(string $string, bool $faster = false): \Closure
    {
        if (mb_strpos($string, $this::CLOSURE) === 0) {
            $string = mb_substr($string, mb_strlen($this::CLOSURE));
        }
        return $this->{$faster ? 'ClosureTokenSerializer' : 'ClosureAstSerializer'}->unserialize($string);
    }
Unserialize closure.

@since 160712 Closure utils.

@param string $string A serialized closure.
@param bool   $faster Used faster serializer?

@return \Closure Unserialized closure.