public Boolean isHeartbeatEnable() {
        return this.heartbeatEnable;
    }
<p>
The write-ahead log (WAL) heartbeat feature mimics a dummy transaction. By doing this, it prevents idle logical
replication slots from holding onto old WAL logs, which can result in storage full situations on the source. This
heartbeat keeps <code>restart_lsn</code> moving and prevents storage full scenarios.
</p>

@return The write-ahead log (WAL) heartbeat feature mimics a dummy transaction. By doing this, it prevents idle
        logical replication slots from holding onto old WAL logs, which can result in storage full situations on
        the source. This heartbeat keeps <code>restart_lsn</code> moving and prevents storage full scenarios.
aws-java-sdk-dms/src/main/java/com/amazonaws/services/databasemigrationservice/model/PostgreSQLSettings.java