public Long getLastModifiedTime() {
        return this.lastModifiedTime;
    }
<p>
The Epoch date and time, in milliseconds, when the retained message was stored by IoT.
</p>

@return The Epoch date and time, in milliseconds, when the retained message was stored by IoT.
aws-java-sdk-iot/src/main/java/com/amazonaws/services/iotdata/model/RetainedMessageSummary.java