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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_request_headers(self, *args, **kwds):
 """ A convenience method for obtaining the headers that were sent to the S3 server. The AWS S3 API depends upon setting headers. This method is provided as a convenience for debugging issues with the S3 communications. """

        if self.request_headers:
            return self._unpack_headers(self.request_headers)