docs: async def async_get_current_transfer_rates(self, use_cache=True):
          """Gets current transfer rates calculated in per second in bytes."""
          now = datetime.utcnow()
          data = await self.async_get_bytes_total(use_cache)
          if self._rx_latest is None or self._tx_latest is None:
              self._latest_transfer_check = now
              self._rx_latest = data[0]
              self._tx_latest = data[1]
              return self._latest_transfer_data
  
          time_diff = now - self._latest_transfer_check
          if time_diff.total_seconds() < 30:
              return self._latest_transfer_data
  
          if data[0] < self._rx_latest:
              rx = data[0]
          else:
              rx = data[0] - self._rx_latest
          if data[1] < self._tx_latest:
              tx = data[1]
          else:
              tx = data[1] - self._tx_latest
          self._latest_transfer_check = now
  
          self._rx_latest = data[0]
          self._tx_latest = data[1]
  
          self._latest_transfer_data = (
              math.ceil(rx / time_diff.total_seconds()) if rx > 0 else 0,
              math.ceil(tx / time_diff.total_seconds()) if tx > 0 else 0)
          return self._latest_transfer_data