League\CommonMark\Context::addBlock PHP Method

    public function addBlock(AbstractBlock $block)
    {
        $this->getBlockCloser()->closeUnmatchedBlocks();
        $block->setStartLine($this->lineNumber);
        while (!$this->tip->canContain($block)) {
            $this->tip->finalize($this, $this->lineNumber);
        }
        $this->tip->appendChild($block);
        $this->tip = $block;
        $this->container = $block;
        return $block;
    }