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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 set_postbuffering_params(self, size=None, store_dir=None):
 """Sets buffering params. Web-proxies like nginx are "buffered", so they wait til the whole request (and its body) has been read, and then it sends it to the backends. :param int size: The size (in bytes) of the request body after which the body will be stored to disk (as a temporary file) instead of memory. :param str|unicode store_dir: Put buffered files to the specified directory. Default: TMPDIR, /tmp/ """

        self._set_aliased('post-buffering', size)
        self._set_aliased('post-buffering-dir', store_dir)

        return self