EmpireCommandManager.java

this.getCommandConditions().addCondition(Residence.class, "serverowned", (contexts, execContext, res) -> {
            if (res == null || !res.isServerOwned()) {
                throw new ConditionFailedException("Must be server owned");
            }
});
this.getCommandConditions().addCondition("creative", c -> {
            Player player = c.getIssuer().getPlayer();
            if (player == null || player.getGameMode() != GameMode.CREATIVE) {
                throw new ConditionFailedException("Must be in Creative Mode");
            }           
});