code: protected void registerFastCloners() {
          this.fastCloners.put(GregorianCalendar.class, new FastClonerCalendar());
          this.fastCloners.put(ArrayList.class, new FastClonerArrayList());
          this.fastCloners.put(Arrays.asList(new Object[] {""}).getClass(), new FastClonerArrayList());
          this.fastCloners.put(LinkedList.class, new FastClonerLinkedList());
          this.fastCloners.put(HashSet.class, new FastClonerHashSet());
          this.fastCloners.put(HashMap.class, new FastClonerHashMap());
          this.fastCloners.put(TreeMap.class, new FastClonerTreeMap());
      }
docs: registers a std set of fast cloners.