public String getReadReplicaSourceDBInstanceIdentifier() {
        return this.readReplicaSourceDBInstanceIdentifier;
    }
<p>
The identifier of the source DB instance if this DB instance is a read replica.
</p>

@return The identifier of the source DB instance if this DB instance is a read replica.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/DBInstance.java