code: public final Object get2d(Object key1, Object key2) {
          AssociativeArray tmp = internalData.get(key1);
          if(tmp == null) {
              return null;
          }
          
          return tmp.internalData.get(key2);
      }
docs: Convenience function to get the value by using both keys.
  
  @param key1
  @param key2
  @return