League\CommonMark\Block\Element\FencedCode::handleRemainingContents PHP Method

    public function handleRemainingContents(ContextInterface $context, Cursor $cursor)
    {
        /** @var FencedCode $container */
        $container = $context->getContainer();
        // check for closing code fence
        if ($cursor->getIndent() <= 3 && $cursor->getFirstNonSpaceCharacter() === $container->getChar()) {
            $match = RegexHelper::matchAll('/^(?:`{3,}|~{3,})(?= *$)/', $cursor->getLine(), $cursor->getFirstNonSpacePosition());
            if (strlen($match[0]) >= $container->getLength()) {
                // don't add closing fence to container; instead, close it:
                $this->setLength(-1);
                // -1 means we've passed closer
                return;
            }
        }
        $context->getTip()->addLine($cursor->getRemainder());
    }