public static BehaviorsDisposable <IEnumerable <T> > AddBehavior <T>
 (
     this IEnumerable <T> collection,
     DoForEachItemCollectionBehavior <T> behavior
 )
 {
     return(collection.AddBehaviorImpl <T>(behavior));
 }
 public static BehaviorsDisposable <IEnumerable <T> > AddBehavior <T>
 (
     this IEnumerable <T> collection,
     Action <T> onAdd,
     Action <T> onRemove = null
 )
 {
     return(collection.AddBehaviorImpl <T>(onAdd, onRemove));
 }
        public static BehaviorsDisposable <IEnumerable <T> > AddBehavior <T>
        (
            this BehaviorsDisposable <IEnumerable <T> > previousBehaviors,
            Action <T> onAdd,
            Action <T> onRemove = null
        )
        {
            IEnumerable <T> collection = previousBehaviors?.TheObjectTheBehaviorsAreAttachedTo;

            return(collection.AddBehaviorImpl <T>(onAdd, onRemove, previousBehaviors));
        }
        private static BehaviorsDisposable <IEnumerable <T> > AddBehaviorImpl <T>
        (
            this IEnumerable <T> collection,
            Action <T> onAdd,
            Action <T> onRemove = null,
            BehaviorsDisposable <IEnumerable <T> > previousBehavior = null
        )
        {
            DoForEachItemCollectionBehavior <T> behavior = new DoForEachItemCollectionBehavior <T>(onAdd, onRemove);

            return(collection?.AddBehaviorImpl <T>(behavior, previousBehavior));
        }