public Integer getTimeToLive() {
        return this.timeToLive;
    }
<p>
The amount of time, in seconds, that FCM should store and attempt to deliver the push notification, if the
service is unable to deliver the notification the first time. If you don't specify this value, FCM defaults to
the maximum value, which is 2,419,200 seconds (28 days).
</p>
<p>
Amazon Pinpoint specifies this value in the FCM time_to_live parameter when it sends the notification message to
FCM.
</p>

@return The amount of time, in seconds, that FCM should store and attempt to deliver the push notification, if
        the service is unable to deliver the notification the first time. If you don't specify this value, FCM
        defaults to the maximum value, which is 2,419,200 seconds (28 days).</p>
        <p>
        Amazon Pinpoint specifies this value in the FCM time_to_live parameter when it sends the notification
        message to FCM.
aws-java-sdk-pinpoint/src/main/java/com/amazonaws/services/pinpoint/model/GCMMessage.java