code: public Object getCachedObject(Class<?> owner, String key) {
  
          key = owner.getName().concat(key);
          return OpenCms.getMemoryMonitor().getCachedMemObject(key);
      }
docs: Returns an object from the cache.<p>
  
  @param owner the owner class of the cached object (used to ensure keys don't overlap)
  @param key the key to lookup the object for
  
  @return an object from the cache, or <code>null</code> if no object matches the given key