@NonNull
    public Set<UUID> toDistinctSet(@Nullable UUID[] uuids) {
        if (uuids == null) uuids = new UUID[0];
        return new HashSet<>(Arrays.asList(uuids));
    }
Length of bytes for 128 bit UUID
rxandroidble/src/main/java/com/polidea/rxandroidble2/internal/util/UUIDUtil.java