public ThingConnectivity withTimestamp(Long timestamp) {
        setTimestamp(timestamp);
        return this;
    }
<p>
The epoch time (in milliseconds) when the thing last connected or disconnected. If the thing has been
disconnected for approximately an hour, the time value might be missing.
</p>

@param timestamp
       The epoch time (in milliseconds) when the thing last connected or disconnected. If the thing has been
       disconnected for approximately an hour, the time value might be missing.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-iot/src/main/java/com/amazonaws/services/iot/model/ThingConnectivity.java