@Override
        public String toString() {
            return "BasicObjectInfo[" +
                "dataBlockSize=" + dataBlockSize + ", " +
                "indexBlock=" + indexBlock + ']';
        }
@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