}

    public void setVersionNo(final Long version) {
        asDocMeta().version(version);
    }

    public Date getExpires() {
        if (getExpiredTime() == null) {
            return null;
        }
        return new Date(getExpiredTime());
    }

    public void setExpires(final Date date) {
        setExpiredTime(date != null ? date.getTime() : null);
    }

    @Override

		formValues.Set("X-Amz-Algorithm", tt.XAmzAlgorithm)
		formValues.Set("X-Amz-Credential", tt.XAmzCredential)
		if tt.Expired {
			// Expired already.
			pp.SetExpires(UTCNow().AddDate(0, 0, -10))
		} else {
			// Expires in 10 days.
			pp.SetExpires(UTCNow().AddDate(0, 0, 10))
		}

		formValues.Set("Policy", base64.StdEncoding.EncodeToString([]byte(pp.String())))