public IExplorerViewModel OpenTab(IEntryModel model = null)
        {
            var initializer = _initializer.Clone();

            if (initializer is ExplorerInitializer)
            {
                ExplorerInitializer eInit = initializer as ExplorerInitializer;
                if (model != null)
                {
                    eInit.Initializers.Add(ExplorerInitializers.StartupDirectory(model));
                }
            }
            else
            if (initializer is ScriptCommandInitializer)
            {
                ScriptCommandInitializer sInit = initializer as ScriptCommandInitializer;

                sInit.OnViewAttached = (model != null) ?
                                       ScriptCommands.Assign("{StartupPath}", model.FullPath, false,
                                                             UIScriptCommands.ExplorerGotoStartupPathOrFirstRoot()) :
                                       UIScriptCommands.ExplorerGotoStartupPathOrFirstRoot();

                sInit.OnModelCreated = ScriptCommands.Assign("{TabbedExplorer}", this, false,
                                                             UIScriptCommands.ExplorerAssignScriptParameters("{Explorer}", "{TabbedExplorer}",
                                                                                                             sInit.OnModelCreated));
            }


            ExplorerViewModel expvm = new ExplorerViewModel(_windowManager, _events)
            {
                Initializer = initializer
            };

            //expvm.Commands.ParameterDicConverter.AddAdditionalParameters(new ParameterDic()
            //    {
            //        {"TabbedExplorer", this }
            //    });
            expvm.DropHelper = new TabDropHelper <IExplorerViewModel>(expvm, this);

            //expvm.FileList.Commands.CommandDictionary.CloseTab =
            //    UIScriptCommands.TabExplorerCloseTab("{TabbedExplorer}", "{Explorer}");
            ////ScriptCommands.ReassignToParameter("{Explorer}", TabbedExplorer.CloseTab(this));
            expvm.FileList.Commands.CommandDictionary.OpenTab =
                ScriptCommands.Assign("{TabbedExplorer}", this, false,
                                      FileList.AssignSelectionToParameter(
                                          UIScriptCommands.TabExplorerNewTab("{TabbedExplorer}", "{Parameter}", null)));
            expvm.DirectoryTree.Commands.CommandDictionary.OpenTab =
                ScriptCommands.Assign("{TabbedExplorer}", this, false,
                                      DirectoryTree.AssignSelectionToParameter(
                                          UIScriptCommands.TabExplorerNewTab("{TabbedExplorer}", "{Parameter}", null)));

            ActivateItem(expvm);
            checkTabs();

            return(expvm);
        }
 protected ExplorerInitializer(ExplorerInitializer initializer)
     : this(initializer.WindowManager, initializer.Events, initializer.RootModels,
            initializer.Initializers.ToArray())
 {
 }