funcsAO.go
func EnsurePrefixF(prefix string) func(string) string {
	return func(s string) string {
		return EnsurePrefix(s, prefix)
	}
}
func EnsurePrefixF(prefix string) func(string) string {
	return func(s string) string {
		return EnsurePrefix(s, prefix)
	}
}
// EnsurePrefixF is the filter form of EnsurePrefix.