public CreateDBInstanceReadReplicaRequest withSourceRegion(String sourceRegion) {
        setSourceRegion(sourceRegion);
        return this;
    }
The region where the source instance is located.

@param sourceRegion
       The region where the source instance is located.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/CreateDBInstanceReadReplicaRequest.java