PHPStan\Analyser\Scope::getCombinedType PHP Method

    private function getCombinedType(array $types) : Type
    {
        if (count($types) === 0) {
            return new MixedType(true);
        }
        $itemType = reset($types);
        array_shift($types);
        foreach ($types as $type) {
            if ($itemType === null) {
                $itemType = $type;
                continue;
            }
            $itemType = $itemType->combineWith($type);
        }
        return $itemType;
    }