Specify how to deal with cached element, including cached block element, element in General Model, and wrapper element in Entity
True: Cloned model will have the same reference to the cached element
False/Not passed: For cached block element, cached element will be undefined. For General Model and Entity, the element will have deep clone and assign to the cloned model
A callback: invoke the callback with the source cached element and a string to specify model type, let the callback return the expected value of cached element.
For General Model and Entity, the callback must return a valid element, otherwise there will be exception thrown.
Options for cloneModel API