protected async function stringifyAsync()

in src/html/tags/c/ConditionalComment.hack [30:39]

• 10 lines of code
• 1 McCabe index (conditional complexity)

  protected async function stringifyAsync(): Awaitable<string> {
    $html = '<!--[if '.$this->:if.']>';
    $html .= await Vec\map_async(
      $this->getChildren(),
      async $child ==> await self::renderChildAsync($child),
    )
      |> Str\join($$, '');
    $html .= '<![endif]-->';
    return $html;
  }