def METHOD_NAME(html: str) -> str:
    from frontend.views import DOCTYPE_HTML_TAG
    safe_html = SafeString(html)
    if safe_html.startswith(DOCTYPE_HTML_TAG):
        # This is the full HTML of the letter, return it.
        return safe_html
    # This is legacy pre-rendered HTML, so it's just the <body>; we
    # need to render the rest ourselves.
    ctx: Dict[str, Any] = {"prerendered_letter_content": safe_html}
    return render_pdf_html(None, "loc/letter-of-complaint.html", ctx, PDF_STYLES_CSS)