func (h Hash) String() string {
	return fmt.Sprintf("%s:%s", h.Algorithm, h.Hex)
}
String reverses NewHash returning the string-form of the hash.
package v1
import (
	"crypto/sha256"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"hash"
	"io"
	"strconv"
	"strings"
)
type Hash struct {
	Algorithm string
	Hex string
}