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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 whitelist(self, address: Address):
 """Whitelist peer address to receive communications from This may be called before transport is started, to ensure events generated during start are handled properly. """

        self.log.debug('Whitelist', address=to_normalized_address(address))
        self._address_mgr.add_address(address)