public RowDataToFieldConverter createConverter(LogicalType type) {
        return wrapIntoNullableConverter(createNotNullConverter(type));
    }
Creates a runtime converter which is null safe.
inlong-sort/sort-formats/format-rowdata/format-rowdata-json/src/main/java/org/apache/inlong/sort/formats/json/RowDataToFieldConverters.java