@SuppressWarnings("unchecked")
    public T setKvDelimiter(char kvDelimiter) {
        this.kvDelimiter = kvDelimiter;
        return (T) this;
    }
The builder for the serializers and deserializers for kv formats.
inlong-sort/sort-formats/format-rowdata/format-rowdata-kv/src/main/java/org/apache/inlong/sort/formats/kv/KvFormatBuilder.java