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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def render_embed_css(self, css_embed: Iterable[bytes]) -> bytes: """Default method used to render the final embedded css for the rendered webpage. Override this method in a sub-classed controller to change the output. """

        return b'<style type="text/css">\n' + b"\n".join(css_embed) + b"\n</style>"