Func autocomplete question ($AnimatedSprite2D)

Godot Version

4.21

Question

1709384129572
may I know why the autocomplete not suggesting the Play() func?
I probably won’t remember all of the func from a class.

Or, is there a way to access all of the available func & properties from $AnimatedSprite2D inside the Godot engine? Right now I just go to the gdscript website manual to check them.
I’m a pretty new Godot user here.

typed variables helps

var animator:AnimationPlayer=$AnimatedSprite2D
animator.pla