public function getImportUseIndexes($perNamespace = false)
    {
        $tokens = $this->tokens;

        $tokens->rewind();

        $uses = [];
        $namespaceIndex = 0;

        for ($index = 0, $limit = $tokens->count(); $index < $limit; ++$index) {
            $token = $tokens[$index];

            if ($token->isGivenKind(T_NAMESPACE)) {
                $nextTokenIndex = $tokens->getNextTokenOfKind($index, [';', '{']);
                $nextToken = $tokens[$nextTokenIndex];

                if ($nextToken->equals('{')) {
                    $index = $nextTokenIndex;
                }

                if ($perNamespace) {
                    ++$namespaceIndex;
                }

                continue;
            }

            if ($token->isGivenKind(T_USE)) {
                $uses[$namespaceIndex][] = $index;
            }
        }

        if (!$perNamespace && isset($uses[$namespaceIndex])) {
            return $uses[$namespaceIndex];
        }

        return $uses;
    }