CallbackAnimationTarget
Description:
[ CCode ( has_construct_function = false ,  type = "AdwAnimationTarget*" ) ]
public CallbackAnimationTarget (owned AnimationTargetFunc callback)
  public CallbackAnimationTarget (owned AnimationTargetFunc callback)
Creates a new `AdwAnimationTarget` that calls the given callback during the animation.
Parameters:
| callback | the callback to call | 
| destroy | the function to be called when the callback action is finalized | 
| user_data | the data to be passed to  | 
Returns:
| the newly created callback target |