@Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (o == null || getClass() != o.getClass()) return false;
        PayloadChecksum that = (PayloadChecksum) o;
        return Objects.equals(checksum, that.checksum) && type == that.type;
    }
Checksums of config definition payload or config payload,
md5 and xxhash64 are the supported types at the moment.

@author hmusum
config/src/main/java/com/yahoo/vespa/config/PayloadChecksum.java