/**
  * @param AssetBlock $assetBlock
  *
  * @return string
  */
 public function renderBlock(AssetBlock $assetBlock)
 {
     $conditional = $assetBlock->getConditional();
     $output = $this->renderCollection($assetBlock->getCollection());
     if (!empty($conditional)) {
         $output = sprintf($this->templates['conditional'], $conditional, $output);
     }
     return $output . "\n";
 }