def METHOD_NAME(obj, ls):
    """Convert the list of sections to HTML.
    This adds the stylesheet, since the sections are assumed to
    already be converted to HTML. It also creates a fall-through
    version for untrusted input, using the object's repr.
    Parameters
    ----------
    obj
        The object
    ls : sequence of str
        The HTML blocks used to combine.
    Returns
    -------
    html : str
        The HTML, including style blocks.
    Notes
    -----
    This is low-level, and so may change significantly.
    """
    out = '<style>'
    out += CSS_STYLE
    out += '</style>'
    # fall through for non-CSS-respecting displays
    #
    out += '<div class="sherpa-text-fallback">'
    out += html.escape(repr(obj))
    out += '</div>'
    out += '<div hidden class="sherpa">'
    out += ''.join(ls)
    out += '</div>'
    return out