@JsonProperty("auto_append_escape_char_after_deserialize")
    @Nullable
    public Boolean getAutoAppendEscapeCharAfterDes() {
        if (autoAppendEscapeCharAfterDes != null) {
            return autoAppendEscapeCharAfterDes;
        }
        return AUTO_APPEND_ESCAPE_CHAR_AFTER_DESERIALIZE_DEFAULT;
    }
It represents CSV format of InLongMsg(m=0).
inlong-sort/sort-common/src/main/java/org/apache/inlong/sort/protocol/deserialization/InLongMsgCsvDeserializationInfo.java