LockedDoor.OnTriggerEnter2D C# (CSharp) Method

    void OnTriggerEnter2D(Collider2D coll)
    {
        //Only allies can activate 
        if (coll.gameObject.tag == "Ally")
        {
            //Character is holding an item
            if (coll.gameObject.transform.childCount == 1)
            {
                //Check if item is correct key
                if (coll.gameObject.GetComponentInChildren<Key>().Identifier == this.Identifier)
                {
                    myRenderer.sprite = openSprite;
                    myCollider.enabled = false;
                    Destroy(coll.gameObject.transform.GetChild(0).gameObject);
                }
            }
        }
    }
}