public void setExpirationTime(final Date expirationTime) {
        this.expirationTime = new Date(expirationTime.getTime());
    }
<p>Setter for the field <code>expirationTime</code>.</p>

@param expirationTime a {@link Date} object
pac4j-jwt/src/main/java/org/pac4j/jwt/credentials/authenticator/JwtAuthenticator.java