private void createOrSelectContentIfNeeded() {
   ToolWindow toolWindow = getToolWindow(myVcs.getProject());
   if (myRefresherI.isFirstTime()) {
     ContentManager manager = toolWindow.getContentManager();
     boolean selectedExistingContent =
         ContentUtilEx.selectContent(manager, myFileHistoryPanel, true);
     if (!selectedExistingContent) {
       ContentUtilEx.addTabbedContent(
           manager, myFileHistoryPanel, "History", myPath.getName(), true);
     }
     toolWindow.activate(null);
   }
 }
 @Nullable
 static FileHistoryRefresherI findExistingHistoryRefresher(
     @NotNull Project project, @NotNull final FilePath path) {
   JComponent component =
       ContentUtilEx.findContentComponent(
           getToolWindow(project).getContentManager(),
           new Condition<JComponent>() {
             @Override
             public boolean value(JComponent component) {
               return component instanceof FileHistoryPanelImpl
                   && ((FileHistoryPanelImpl) component).getFilePath().equals(path);
             }
           });
   return component == null ? null : ((FileHistoryPanelImpl) component).getRefresher();
 }
 @Override
 public UpdateInfoTree showUpdateProjectInfo(
     UpdatedFiles updatedFiles,
     String displayActionName,
     ActionInfo actionInfo,
     boolean canceled) {
   if (!myProject.isOpen() || myProject.isDisposed()) return null;
   ContentManager contentManager = getContentManager();
   if (contentManager == null) {
     return null; // content manager is made null during dispose; flag is set later
   }
   final UpdateInfoTree updateInfoTree =
       new UpdateInfoTree(contentManager, myProject, updatedFiles, displayActionName, actionInfo);
   ContentUtilEx.addTabbedContent(
       contentManager,
       updateInfoTree,
       "Update Info",
       DateFormatUtil.formatDateTime(System.currentTimeMillis()),
       true,
       updateInfoTree);
   ToolWindowManager.getInstance(myProject).getToolWindow(ToolWindowId.VCS).activate(null);
   updateInfoTree.expandRootChildren();
   return updateInfoTree;
 }