code: public Object opt(int index) {
  
          return ((index < 0) || (index >= length())) ? null : m_myArrayList.get(index);
      }
docs: Get the optional object value associated with an index.<p>
  
  @param index the index must be between 0 and length() - 1
  @return      an object value, or null if there is no object at that index