public void setReplicationSourceIdentifier(String replicationSourceIdentifier) {
        this.replicationSourceIdentifier = replicationSourceIdentifier;
    }
<p>
Contains the identifier of the source cluster if this cluster is a secondary cluster.
</p>

@param replicationSourceIdentifier
       Contains the identifier of the source cluster if this cluster is a secondary cluster.
aws-java-sdk-docdb/src/main/java/com/amazonaws/services/docdb/model/DBCluster.java