code: def unwrap(self):
          
          if self._error:
              raise compat.saved_exc(self._error)
          elif self._closing or self._handle.closed:
              raise TransportError('SSL transport is closing/closed')
          self._close_on_unwrap = False
          self._write_backlog.append([b'', False])
          self._process_write_backlog()
docs: Remove the security layer.
  
          Use this method only if you want to send plaintext data on the
          connection after the security layer has been removed. In all other
          cases, use :meth:`close`.
  
          If the unwrap is initiated by us, then any data sent after it will be
          buffered until the corresponding close_notify response is received from
          our peer.
  
          If the unwrap is initiated by the remote peer, then this method will
          acknowledge it. You need an application level protocol to determine
          when to do this because the receipt of a close_notify is not
          communicated to the application.