OptionalanimationsAnimations to register, keyed as AnimationPlayer#addAnimations describes
OptionalautoAnimation to start playing on construction
true plays the first registered animation, and a string plays the animation
registered under that label.
OptionalautoWhether playback advances on Ticker.shared; see AnimationPlayer#autoUpdate
Root of the hierarchy to animate; tracks find their nodes in its subtree, itself included
Options for creating an animation player
Example