func Layout(layout string) Option {
	return func(s *stamper) {
		s.layout = layout
	}
}
Layout for specifying custom timestamp layout
package timestamper
import (
	"bytes"
	"time"
	"golang.org/x/text/transform"
)
type Option func(*stamper)
func UTC() Option {
	return func(s *stamper) {
		s.utc = true
	}
}