<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def set_backbuffer(self, preferred_backbuffer_size, flags=0):
 """Create the backbuffer for the game."""

        if not (isinstance(preferred_backbuffer_size, Vector2)):
            raise ValueError("preferred_backbuffer_size must be of type Vector2")

        self.__backbuffer = pygame.display.set_mode(preferred_backbuffer_size, flags)
        self.Camera.world_center = preferred_backbuffer_size / 2.0