League\CommonMark\Block\Element\AbstractBlock::finalize PHP Method

    public function finalize(ContextInterface $context, $endLineNumber)
    {
        if (!$this->open) {
            return;
            // TODO: Throw AlreadyClosedException?
        }
        $this->open = false;
        $this->endLine = $endLineNumber;
        $context->setTip($context->getTip()->parent());
    }

 public function closeUnmatchedBlocks()
 {
     while ($this->oldTip !== $this->lastMatchedContainer) {
         $this->oldTip->finalize($this->context);
         $this->oldTip = $this->oldTip->getParent();
     }
 }