public void add(Listable itemToAdd) {
		Listable[] list = new Listable[items.length + 1];							// creates a new deep copy
		for (int i=0; i<items.length; i++){
			list[i] = items[i];
		}

		for (int i=0; i<list.length; i++){											// loops through the copy to see if the new item is larger or smaller than the index
			if (itemToAdd.getKeyValue() > list[i].getKeyValue()){					// if the new item is larger:
				list[i] = itemToAdd; 						 						// set the new item equal to that index
				}
			else {																	// if the new item is not larger:
				list[i] = list[i];													// the index value remains what it was
			}
		}
	}