League\CommonMark\HtmlRenderer::renderBlocks PHP Method

    public function renderBlocks($blocks, $inTightList = false)
    {
        $result = [];
        foreach ($blocks as $block) {
            $result[] = $this->renderBlock($block, $inTightList);
        }
        $separator = $this->getOption('block_separator', "\n");
        return implode($separator, $result);
    }

 /**
  * @param Document $block
  * @param bool $inTightList
  *
  * @return string
  */
 public function render(AbstractBlock $block, HtmlRenderer $htmlRenderer, $inTightList = false)
 {
     if (!$block instanceof Document) {
         throw new \InvalidArgumentException('Incompatible block type: ' . get_class($block));
     }
     $wholeDoc = $htmlRenderer->renderBlocks($block->getChildren());
     return $wholeDoc === '' ? '' : $wholeDoc . "\n";
 }