def METHOD_NAME(self, source, outfile):
    for i, (c, t) in enumerate(HtmlFormatter.METHOD_NAME(self, source, outfile)):
        as_functions = self.lines.get(i-1, None)
        if as_functions is not None:
            yield 0, ('<div title=%s style="background: #ccffcc">[%2d]' %
                      (quoteattr('as ' + ', '.join(as_functions)),
                       len(as_functions)))
        else:
            yield 0, '    '
        yield c, t
        if as_functions is not None:
            yield 0, '</div>'