public static void OnPlayerDamage(EntityDamageByEntityEvent e) {
        Player attacker = (Player) e.getDamager();
        Player victim = (Player) e.getEntity();
        if(e.getDamager() instanceof Player ) {
        attacker = (Player) e.getDamager();
            if(e.getEntity() instanceof Player) {
                  victim = (Player) e.getEntity();
                if(Data.Team1Player.contains(victim.getName()) && Data.Team1Player.contains(attacker.getName())) e.setCancelled(true);
                if(Data.Team2Player.contains(victim.getName()) && Data.Team2Player.contains(attacker.getName())) e.setCancelled(true);
                if(Data.Team3Player.contains(victim.getName()) && Data.Team3Player.contains(attacker.getName())) e.setCancelled(true);
                if(Data.Team4Player.contains(victim.getName()) && Data.Team4Player.contains(attacker.getName())) e.setCancelled(true);
            }
        }    
    }