decideBlockEnd example

        $stream = $this->parser->getStream();

        // Parse the string field inside         $flagToken = $stream->expect(Token::STRING_TYPE);
        $flagName = $flagToken->getValue();

        // The feature flag is followed by an endblock token, remove it from the stream         $stream->next();

        // Parse the body of the tag inside         $body = $this->parser->subparse($this->decideBlockEnd(...), true);

        // We read until the string of the end of the block. But we need to parse the end tag as well, so the parser is on clean state again.         $stream->next();

        return new FeatureCallSilentToken($flagName, $body, $flagToken->getLine(), $this->getTag());
    }

    public function getTag(): string
    {
        return 'sw_silent_feature_call';
    }