code: public Object getCache(ModelKey modelKey) {
  		String modelClassName = null;
  		if (modelKey.getModelClass() == null) {
  			ModelMapping modelMapping = this.modelFactory.getModelMapping(modelKey.getFormName());
  			modelClassName = modelMapping.getClassName();
  		} else
  			modelClassName = modelKey.getModelClass().getName();
  		return modelCacheManager.getCache(modelKey.getDataKey(), modelClassName);
  
  	}
docs: get the model instance from the cache