private function registerFoundToken($token)
    {
        // inlined extractTokenKind() call on the hot path
        $tokenKind = $token instanceof Token
            ? ($token->isArray() ? $token->getId() : $token->getContent())
            : (\is_array($token) ? $token[0] : $token)
        ;

        if (!isset($this->foundTokenKinds[$tokenKind])) {
            $this->foundTokenKinds[$tokenKind] = 0;
        }

        ++$this->foundTokenKinds[$tokenKind];
    }