@Override
    public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{");
        if (getEngine() != null)
            sb.append("Engine: ").append(getEngine()).append(",");
        if (getEngineVersion() != null)
            sb.append("EngineVersion: ").append(getEngineVersion()).append(",");
        if (getDBParameterGroupFamily() != null)
            sb.append("DBParameterGroupFamily: ").append(getDBParameterGroupFamily()).append(",");
        if (getFilters() != null)
            sb.append("Filters: ").append(getFilters()).append(",");
        if (getMaxRecords() != null)
            sb.append("MaxRecords: ").append(getMaxRecords()).append(",");
        if (getMarker() != null)
            sb.append("Marker: ").append(getMarker()).append(",");
        if (getDefaultOnly() != null)
            sb.append("DefaultOnly: ").append(getDefaultOnly()).append(",");
        if (getListSupportedCharacterSets() != null)
            sb.append("ListSupportedCharacterSets: ").append(getListSupportedCharacterSets()).append(",");
        if (getListSupportedTimezones() != null)
            sb.append("ListSupportedTimezones: ").append(getListSupportedTimezones());
        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-neptune/src/main/java/com/amazonaws/services/neptune/model/DescribeDBEngineVersionsRequest.java