public void setRollbackReason(String rollbackReason) {
        this.rollbackReason = rollbackReason;
    }
<p>
The reason for this instance refresh rollback (for example, whether a manual or automatic rollback was
initiated).
</p>

@param rollbackReason
       The reason for this instance refresh rollback (for example, whether a manual or automatic rollback was
       initiated).
aws-java-sdk-autoscaling/src/main/java/com/amazonaws/services/autoscaling/model/RollbackDetails.java