Setter function didn't appear on call method animation player

Godot Version

Godot 4

Question

I can’t find my setter function on Animation player

extends CharacterBody2D


@export var health = 100
@export var acd = 2

@onready var yudi: CharacterBody2D = $"."
@onready var dash = $Dash
@onready var timer = $Att_CD

var basespeed = 300.0
var can_attack : bool = true

var _is_attacking := false:
	set(value):
		_is_attacking = value


const dashspeed = 750
const dashlength = .2

func _physics_process(delta: float) -> void:
	var direction_x := Input.get_axis("left", "right")
	var direction_y := Input.get_axis("up", "down")
	#print(position-get_global_mouse_position())
	#print("player pos", position)
	#print("mouse pos", get_global_mouse_position())
	
	if position > get_global_mouse_position():
		$Sprite2D.flip_h = true
		$Sprite2D/Hitbox/CollisionShape2D.position.x = -60
		#print("right")
	else :
		$Sprite2D.flip_h = false
		$Sprite2D/Hitbox/CollisionShape2D.position.x = 60
		#print("left")
	
	if Input.is_action_just_pressed("dash"):
		can_attack = true
		dash.start_dash(dashlength)
	var SPEED = dashspeed if dash.is_dashing() else basespeed

	if direction_x:
		velocity.x = direction_x * SPEED
	else:
		velocity.x = move_toward(velocity.x, 0, SPEED)
	if direction_y:
		velocity.y = direction_y * SPEED
	else:
		velocity.y = move_toward(velocity.x, 0, SPEED)
		
	
	if Input.is_action_just_pressed("spasi") and can_attack:
		$AnimationPlayer.play("attack_front")
		can_attack = false
		timer.attacked(2)
		velocity = Vector2.ZERO
		velocity = (get_global_mouse_position() - position) * delta * 150
		await $Att_CD/Att_Timer.timeout
		print("can attack")
		can_attack = true

	if velocity.x != 0 and $AnimationPlayer.current_animation != "attack_front":
		$AnimationPlayer.play("walk_front")

	elif velocity.y != 0 and $AnimationPlayer.current_animation != "attack_front":
		$AnimationPlayer.play("walk_front")
	else :
		if $AnimationPlayer.current_animation != "attack_front":
			$AnimationPlayer.play("idle")
	#player_movement(delta)
	if not _is_attacking:
		move_and_slide()
	

Am I doing this wrong?

Thank you in advance

That is a property not a method, you should use a property track instead

I can’t find it on property too

It’s hidden because it’s got a leading underscore

i still can’t find it…

I use this topic as reference

Try exporting it, I don’t think you can animate non-exports