src/Fixer/Phpdoc/PhpdocTypesOrderFixer.php
private function sortJoinedTypes($types)
    {
        $types = array_filter(
            Preg::split('/([^|<]+(?:<.*>)?)/', $types, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY),
            static function ($value) {
                return '|' !== $value;
            }
        );

        return implode('|', $this->sortTypes($types));
    }
private function sortJoinedTypes($types)
    {
        $types = array_filter(
            Preg::split('/([^|<]+(?:<.*>)?)/', $types, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY),
            static function ($value) {
                return '|' !== $value;
            }
        );

        return implode('|', $this->sortTypes($types));
    }
@param string $types

@return string