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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 get_decoder(self, content_type):
 """ Get the decoding function for the provided content type for this bucket. :param content_type: the requested media type :type content_type: str :rtype: function """

        if content_type in self._decoders:
            return self._decoders[content_type]
        else:
            return self._client.get_decoder(content_type)