dynamicclean (target:T, state:S):Void
Prepares a display object to be used again. This method should restore
the display object to its original state from when it was returned by
Creates a new display object.
Destroys/disposes a display object when it will no longer be used.
dynamicupdate (target:T, state:S):Void
Updates the properties an existing display object. It may be a display
object that was used previously, but it will have been passed to
clean() to ensure that it has been restored to its original state.