public function markdown(string $markdown, array $args = []): string
    {
        if (!$markdown) {
            return $markdown;
        } elseif (!$this->canMarkdown()) {
            return $markdown;
        } elseif (!$this->WPCom_Markdown) {
            return $markdown;
        }
        $default_args = ['unslash' => false];
        $args += $default_args; // Merge defaults.

        return (string) $this->WPCom_Markdown->transform($markdown, $args);
    }