static L cloneList(Collection l) { if (l == null) ret new L; //O mutex = getOpt(l, "mutex"); /*if (mutex != null) synchronized(mutex) { ret new ArrayList(l); } else ret new ArrayList(l);*/ // assume mutex is equal to collection, which will be true unless you explicitly pass a mutex to synchronizedList() which no one ever does. synchronized(l) { ret new ArrayList(l); } }