úβiSafeTA simple round-robin table useful for selecting resource using round-robin fashion.%create a round-robin table from list.5If list is empty, an error will be raised. will use NonEmpty" in future(ghc 8 are widely used).&select an item from round-robin table.set a new round-robin table.Fl4ftJRczRU2O5rNe2Vd8bData.RoundRobin RoundRobin newRoundRobinselectset