Communicating between classes

1

I have two classes. One of the class file has declared an Array. I want to add item to the array from another class on a button class. I don’t know how to do this.

MyArray class

package{
    public var myArrar:Array
    public class MyArray{
        public function MyArray(){
            
        }
    }
}

MyButton class

package{
    import flash.display.*
    import flash.events.*
    public class MyButton extends MovieClip{
        public function MyButton():void{
            this.addEventListener(MouseEvent.CLICK,clickHandler)
        }
        function clickHandler(e:MouseEvent):void{
            myArrar.push("as3")
        }
    }
}

I am getting this error
1120: Access of undefined property myArrar.