CommonMark - Overriding default renderers

CustomParagraphRenderer.php

<?php

use League\CommonMark\Block\Element\AbstractBlock;
use League\CommonMark\ElementRendererInterface;

class CustomParagraphRenderer implements BlockRendererInterface
{
    public function render(AbstractBlock $block, ElementRendererInterface $htmlRenderer, $inTightList = false)
    {
        return $htmlRenderer->renderInlines($block->children());
    }
}

main.php

<?php

$environment = Environment::createCommonMarkEnvironment();
$environment->addBlockRenderer('League\CommonMark\Block\Element\Paragraph', new CustomParagraphRenderer());

$converter = new CommonMarkConverter([], $environment);
echo $converter->convertToHtml('**Hello World!**');