OfflinePlayerWorkaround.java

    @SuppressWarnings("deprecation")
    private UUID getIdFromBukkit(String name) {
        Bukkit.getLogger().warning("Using potentially blocking Bukkit UUID lookup for: " + name);
        UUID uuid = Bukkit.getOfflinePlayer(name).getUniqueId();
        // If the uuid matches the fake one from Bukkit, return it as fake
        if (uuid.equals(UUID.nameUUIDFromBytes(("OfflinePlayer:" + name).getBytes(Charsets.UTF_8)))) {
            return null;
        } else {
            return uuid;
        }
    }