public void setSourceFileSystemId(String sourceFileSystemId) {
        this.sourceFileSystemId = sourceFileSystemId;
    }
<p>
Specifies the Amazon EFS file system that you want to replicate. This file system cannot already be a source or
destination file system in another replication configuration.
</p>

@param sourceFileSystemId
       Specifies the Amazon EFS file system that you want to replicate. This file system cannot already be a
       source or destination file system in another replication configuration.
aws-java-sdk-efs/src/main/java/com/amazonaws/services/elasticfilesystem/model/CreateReplicationConfigurationRequest.java