private int[] IdsOfNeededItems(int countOfNeededItems)
{
List <int> allIds = itemsKeeper.GetIdsOfItems();
int[] ids = new int[countOfNeededItems];
for (int i = 0; i < ids.Length; i++)
{
ids[i] = allIds[Random.Range(0, allIds.Count)];
allIds.Remove(ids[i]);
}
return(ids);
}