Animate CC How can i cache as bitmap movie clip?

I have a movie clip (enemy) inside the enemy i have 3 frames for iddle, attack and run.The enemies are inside Array.What is the better way to cache as bitmap the enemy and movie clips inside the enemy?

var greengoblinVelocity: int = 0;

var e: int;
for (e = numChildren - 1; e >= 0; e--)
{
var childdE: DisplayObject = getChildAt(e);
if (childdE.name.indexOf("enemy") > -1)
{
   GreenGoblinArray.push(MovieClip(childdE));
   MovieClip(childdE).hitPoints = 2;
   MovieClip(childdE).currentX = 0;
   MovieClip(childdE).startAttack = 0;
}
}


stage.addEventListener(Event.ENTER_FRAME, gameloop);
function gameloop(event: Event😞 void
{
for (var enl = 0; enl < GreenGoblinArray.length; enl++)
   {
   var enemy: Enemy = GreenGoblinArray[enl] as Enemy;
   }
}