private static void deserializeDataArray(byte[] destination, int length, Deserializer buf) {
        for (int i = 0; i < length; i++) {
            destination[i] = buf.getByte(null);
        }
    }
Serializes the Sketch.

Serialization format
==================
Original size:     4 bytes
Compressed size:   4 bytes
Compressed data:   N * 1 bytes

Invariant:
     compressed size &lt;= original size

Special case:
     compressed size == original size =&gt; data is uncompressed

@param buf Serializer
searchlib/src/main/java/com/yahoo/searchlib/aggregation/hll/NormalSketch.java