private int probeNext(int index) {
        // The array lengths are always a power of two, so we can use a bitmask to stay inside the array bounds.
        return (index + 1) & mask;
    }
Get the next sequential index after {@code index} and wraps if necessary.
jraft-rheakv/rheakv-core/src/main/java/com/alipay/sofa/jraft/rhea/util/ByteObjectHashMap.java