public static void OnGUI(Rect position, InfoboxAttribute attrib)
 {
     EditorGUI.HelpBox(position, attrib.Message, (MessageType)attrib.MessageType);
 }
 public static float GetHeight(InfoboxAttribute attrib)
 {
     GUIStyle style = GUI.skin.GetStyle("HelpBox");
     return Mathf.Max(40f, style.CalcHeight(new GUIContent(attrib.Message), EditorGUIUtility.currentViewWidth));
 }