def METHOD_NAME(self, match):
    self.content_type = match.group(1)
    prefix_len = match.start(1) - match.start(0)
    yield match.start(0), Text.Whitespace, match.group(0)[:prefix_len]
    yield match.start(1), Name.Label, match.group(2)
    yield match.end(2), String.Delimiter, '/'
    yield match.start(3), Name.Label, match.group(3)