Generate a full HTML document from a body
protected function wrapHTMLBody(
Facebook\HHAPIDoc\Documentable $what,
string $body,
): string;
Facebook\HHAPIDoc\Documentable $whatstring $body the main content of the document in HTML format,
suitable for insertion into<body> tags. It does not include the
<body> tags.a - full HTML document, including the outermost <html> tag.