@Override
  public @Nullable Function<? super @NotNull FileEditor, ? extends @Nullable JComponent> collectNotificationData(@NotNull Project project,
                                                                                                                 @NotNull VirtualFile file) {
    return ChangelistConflictTracker.getInstance(project).hasConflict(file)
           ? fileEditor -> ChangelistConflictNotificationPanel.create(project, file, fileEditor)
           : null;
  }
@Override
  public @Nullable Function<? super @NotNull FileEditor, ? extends @Nullable JComponent> collectNotificationData(@NotNull Project project,
                                                                                                                 @NotNull VirtualFile file)