public RevTree lookupTree(AnyObjectId id) {RevTree c = (RevTree) objects.get(id);if (c == null) {c = new RevTree(id);objects.add(c);}return c;}

public virtual RevTree LookupTree(AnyObjectId id){RevTree c = (RevTree)objects.Get(id);if (c == null){c = new RevTree(id);objects.Add(c);}return c;}
