@Override
        public String toString() {
            return "FindIndexResult[" +
                "isFulfilled=" + isFulfilled + ", " +
                "nextStartOffset=" + nextStartOffset + ", " +
                "nextMaxBytes=" + nextMaxBytes + ", " +
                "streamDataBlocks=" + streamDataBlocks + ']';
        }
@param dataBlockSize The total size of the data blocks, which equals to index start position.
@param indexBlock    raw index data.
s3stream/src/main/java/com/automq/stream/s3/ObjectReader.java