func (s PlayerStandings) ByWinnings(oldTieBreak bool) {
	if oldTieBreak {
		sort.Sort(sort.Reverse(ByWinningsOld{s}))
	} else {
		sort.Sort(sort.Reverse(ByWinnings{s}))
	}
}
func (s PlayerStandings) ByWinnings(oldTieBreak bool) {
	if oldTieBreak {
		sort.Sort(sort.Reverse(ByWinningsOld{s}))
	} else {
		sort.Sort(sort.Reverse(ByWinnings{s}))
	}
}
// Various ways to sort the player standings using helper structs that
// implement different comparison methods.