public void setHistorySession(@NotNull VcsHistorySession session) {
      if (myFileHistoryPanel == null) {
        myFileHistoryPanel = new FileHistoryPanelImpl(myVcs, myPath, myStartingRevisionNumber, session, myVcsHistoryProvider,
                                                      myRefresher, false);
        add(myFileHistoryPanel, BorderLayout.CENTER);
        DataManager.registerDataProvider(this, myFileHistoryPanel);
        Disposer.register(FileHistorySessionPartner.this, myFileHistoryPanel);
      }
      else if (!session.getRevisionList().isEmpty()) {
        myFileHistoryPanel.setHistorySession(session);
      }
    }
public void setHistorySession(@NotNull VcsHistorySession session)