if (enlargeableButtons[i][j].gameObject.activeSelf && enlargeableButtons[i][j].IsHighlighted())
   {
      enlargeableButtons[i][j].gameObject.SetIsHighlighted(true, HoverEffect.EnlargeImage);
   }

GameObject temp = enlargeableButtons[i][j].gameObject;

if (temp.activeSelf && temp.IsHighlighted())
   {
      temp.SetIsHighlighted(true, HoverEffect.EnlargeImage);
   }