public AmazonWebServiceRequest getCloneRoot() {
        AmazonWebServiceRequest cloneRoot = cloneSource;
        if (cloneRoot != null) {
            while (cloneRoot.getCloneSource() != null) {
                cloneRoot = cloneRoot.getCloneSource();
            }
        }
        return cloneRoot;
    }
Returns the root object from which the current object was cloned; or null if there isn't one.
aws-java-sdk-core/src/main/java/com/amazonaws/AmazonWebServiceRequest.java