//
// Lock ranks that allow self-cycles list themselves.
var lockPartialOrder [][]lockRank = [][]lockRank{
`)
	for _, rank := range topo {
		if isPseudo(rank) {
			continue
		}
		list := []string{}
		for _, before := range g.Edges(rank) {
			if !isPseudo(before) {
				list = append(list, cname(before))
			}
		}
		if cyclicRanks[rank] {
			list = append(list, cname(rank))
		}