public static void DrawRegionBg(Rect rect, out Rect headerRect, out Rect contentRect)
{
headerRect = new Rect(rect.x + 2f, rect.y, rect.width - 2f, 22f);
contentRect = new Rect(rect.x, headerRect.yMax, rect.width, rect.height - 22f);
GUI.Label(new RectOffset(1, 1, 1, 1).Add(contentRect), GUIContent.none, EditorStyles.helpBox);
}