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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 read(self):
 """ If there is data available to be read from the transport, reads the data and tries to parse it as a protobuf message. If the parsing succeeds, return a protobuf object. Otherwise, returns None. """

        if not self.ready_to_read():
            return None

        data = self._read()
        if data is None:
            return None

        return self._parse_message(data)