public boolean add(Permission permission) { if (contains(permission)){ return false; } else { idMap.put(permission.getId(), permission); return true; } }
public boolean add(Permission permission) { return wrappedSet.add(permission); }
	public boolean add(Permission permission)    {        if (contains(permission)){            return false;                    }        else {            idMap.put(permission.getId(), permission);            return true;        }    }