func diffSets(w io.Writer, p types.Path, v1, v2 types.Set) error {
return diffOrdered(w, p, line, func(cc chan<- types.ValueChanged, sc <-chan struct{}) {
v2.DiffLeftRight(v1, cc, sc)
},
func(k types.Value) types.Value { return nil },
func(k types.Value) types.Value { return k },
func(k types.Value) types.Value { return k },
)
}
