public override void OnHeaderGUI()
        {
            GUI.color = Color.white;
            BtNode  node  = target as BtNode;
            BtGraph graph = node.graph as BtGraph;

            string title = target.name;

            GUILayout.Label(title, NodeEditorResources.styles.nodeHeader, GUILayout.Height(30));
            GUI.color = Color.white;
        }
 public override void OnBodyGUI()
 {
     base.OnBodyGUI();
     BtNode  node  = target as BtNode;
     BtGraph graph = node.graph as BtGraph;
 }