public void SaveAsset()
        {
            if (tmpAsset == null)
            {
                return;
            }
            List <BTNode> children = new List <BTNode>();
            var           path     = tree == null ? null : AssetDatabase.GetAssetPath(tree);

            tmpAsset.EditorResort();
            if (string.IsNullOrEmpty(path))
            {
                path = EditorUtility.SaveFilePanelInProject("Save Behaviour Tree", AssetName, "asset", "Save behaviour asset.");
                if (string.IsNullOrEmpty(path))
                {
                    return;
                }
                if (File.Exists(path))
                {
                    AssetDatabase.DeleteAsset(path);
                }
                tree = tmpAsset.Clone();
                var name = Path.GetFileName(path);
                if (name.EndsWith(".asset"))
                {
                    name = name.Substring(0, name.Length - 6);
                }
                tree.name = name;
                AssetDatabase.CreateAsset(tree, path);
                tree.GetAllNodes(children);
                foreach (var t in children)
                {
                    AssetDatabase.AddObjectToAsset(t.Asset, path);
                }
                AssetDatabase.ImportAsset(path);
            }
            else
            {
                tmpAsset.EditorMergeTo(path, tree);
                tree.GetAllNodes(children);
                foreach (var t in children)
                {
                    AssetDatabase.AddObjectToAsset(t.Asset, path);
                }
                AssetDatabase.ImportAsset(path);
            }
            //AssetDatabase.SaveAssets();
        }
 public void Reset()
 {
     if (runner != null && tree == null)
     {
         tree = runner.SourceAsset;
     }
     if (tree != null)
     {
         runtimeBinder = runner == null ? null : runner.GetBinder(tree);
         if (tmpAsset == null)
         {
             tmpAsset = tree.Clone();
         }
         else
         {
             tree.EditorMergeTo(null, tmpAsset);
         }
         if (updateTreeAsset != null)
         {
             updateTreeAsset();
         }
     }
 }