public Event withSentAt(java.util.Date sentAt) {
        setSentAt(sentAt);
        return this;
    }
<p>
The timestamp (in Unix time) on the client side when the event occurred.
</p>

@param sentAt
       The timestamp (in Unix time) on the client side when the event occurred.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-personalizeevents/src/main/java/com/amazonaws/services/personalizeevents/model/Event.java