@Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{");
        if (getRollbackReason() != null)
            sb.append("RollbackReason: ").append(getRollbackReason()).append(",");
        if (getRollbackStartTime() != null)
            sb.append("RollbackStartTime: ").append(getRollbackStartTime()).append(",");
        if (getPercentageCompleteOnRollback() != null)
            sb.append("PercentageCompleteOnRollback: ").append(getPercentageCompleteOnRollback()).append(",");
        if (getInstancesToUpdateOnRollback() != null)
            sb.append("InstancesToUpdateOnRollback: ").append(getInstancesToUpdateOnRollback()).append(",");
        if (getProgressDetailsOnRollback() != null)
            sb.append("ProgressDetailsOnRollback: ").append(getProgressDetailsOnRollback());
        sb.append("}");
        return sb.toString();
    }
Returns a string representation of this object. This is useful for testing and debugging. Sensitive data will be
redacted from this string using a placeholder value.

@return A string representation of this object.

@see java.lang.Object#toString()
aws-java-sdk-autoscaling/src/main/java/com/amazonaws/services/autoscaling/model/RollbackDetails.java