registerUndefinedTokenParserCallback example

/** * @internal */
    public function getTokenParser(string $name): ?TokenParserInterface
    {
        return $this->extensionSet->getTokenParser($name);
    }

    public function registerUndefinedTokenParserCallback(callable $callable): void
    {
        $this->extensionSet->registerUndefinedTokenParserCallback($callable);
    }

    public function addNodeVisitor(NodeVisitorInterface $visitor)
    {
        $this->extensionSet->addNodeVisitor($visitor);
    }

    /** * @return NodeVisitorInterface[] * * @internal */