source: TFP-WebServer/WebServer/src/LiveData/Hostiles.cs

namespace Webserver.LiveData {
        public class Hostiles : EntityFilterList<EntityEnemy> {
                public static readonly Hostiles Instance = new Hostiles ();

                protected override EntityEnemy predicate (Entity _e) {
                        if (_e is EntityEnemy enemy && enemy.IsAlive ()) {
                                return enemy;
                        }

                        return null;
                }
        }
}