How do people in a body cast go to the bathroom?

Built in bedpans I suppose....or perhaps there is a tubular device involved.....drains... maybe they just go in the cast...HAAHhaHAHhHAHAHhHAh have you ever thought that Sophocles would have been better off as Nebbuchadnezzar??? i think that all of history would be changed if that had simply occurred. we would all be saved....and not just the whales. I suspect they have little openings or flaps in the cast in all the right places.