code: public synchronized Map<T, Resource> get()
      {
          if (!done.get())
          {
              throw new LionEngineException(ERROR_NOT_FINISHED);
          }
          return Collections.unmodifiableMap(resources);
      }
docs: Get the loaded resources. Can be called safely after {@link #await()}. Else ensure all resources has been loaded.
  
  @return The loaded resources as read only.
  @throws LionEngineException If resources are not fully loaded.