@Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{");
        if (getReferenceId() != null)
            sb.append("ReferenceId: ").append(getReferenceId()).append(",");
        if (getTableNameUpdate() != null)
            sb.append("TableNameUpdate: ").append(getTableNameUpdate()).append(",");
        if (getS3ReferenceDataSourceUpdate() != null)
            sb.append("S3ReferenceDataSourceUpdate: ").append(getS3ReferenceDataSourceUpdate()).append(",");
        if (getReferenceSchemaUpdate() != null)
            sb.append("ReferenceSchemaUpdate: ").append(getReferenceSchemaUpdate());
        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-kinesisanalyticsv2/src/main/java/com/amazonaws/services/kinesisanalyticsv2/model/ReferenceDataSourceUpdate.java