@Override
    public boolean isAnnotationShown(@NotNull OnesideTextDiffViewer viewer, @NotNull Side side) {
      if (side != viewer.getSide()) return false;
      return AnnotateToggleAction.hasVcsAnnotations(viewer.getEditor());
    }
@Override
    public boolean isAnnotationShown(@NotNull OnesideTextDiffViewer viewer, @NotNull Side side)