public override void OnGUILayout()
 {
     if (drawer == null)
     {
         BoxedHeaderAttribute attr = GetAttr <BoxedHeaderAttribute>();
         drawer = new HeaderDrawer()
         {
             Header = attr.Header,
         };
     }
     drawer.OnGUILayout();
 }
        public override void OnGUILayout()
        {
            BoxedHeaderAttribute attr = GetAttr <BoxedHeaderAttribute>();

            EGUILayout.DrawBoxHeader(attr.Header, GUILayout.ExpandWidth(true));
        }