private static int putUint32(PositionedByteRange dst, int val) {
    dst.put((byte) (val >>> 24)).put((byte) (val >>> 16)).put((byte) (val >>> 8)).put((byte) val);
    return 4;
  }
Write a 32-bit unsigned integer to {@code dst} as 4 big-endian bytes.
@return number of bytes written.
hbase-common/src/main/java/org/apache/hadoop/hbase/util/OrderedBytes.java