Sprite Manager Play animation

HI guys .. i need your help,, i have gameObject with packedSprite.cs (Sprite Manager 2) Script on it.. and have 1 animation with name "walk",.

then i adding new script in this game object the name is randomMover.cs ..

i want to play animation "walk" with randomMover.cs but always fail

 public class randomMover : SampleBase {
 
 private PackedSprite animSprite = GetComponent(typeof(PackedSprite)) as PackedSprite;
 
 void Start(){
   animSprite.PlayAnim("walk");
 }
 
 }

the result is error :

Assets/Spawner/Example/Script/RandomMover.cs(33,43): error CS0236: A field initializer cannot reference the nonstatic field, method, or property `UnityEngine.Component.GetComponent(System.Type)'

Thanks