code: def get_flash_region(self, offset, length):
          
          return self._get(GetBytesFlashRequest(offset=offset, length=length))
docs: Retrieves the contents of a region of flash from the watch. This only works on watches running
          non-release firmware.
          Raises :exc:`.GetBytesError` on failure.
  
          :return: The retrieved data
          :rtype: bytes