code: public Object getInstance(ComponentAdapter componentAdapter) {
  		Object componentKey = componentAdapter.getComponentKey();
  		Object instance = compKeyInstances.get(componentKey);
  		if (instance == null) {
  			instance = loadSaveInstance(componentAdapter, componentKey);
  		}
  		return instance;
  	}
docs: modify this method of old DefaultPicocontainer
  
  @param componentAdapter
  @return