@NotNull
  private IntPair getSelectedRevisionsRange(@NotNull BlockData blockData) {
    List<VcsFileRevision> selection = myList.getSelectedObjects();
    if (selection.isEmpty()) return new IntPair(0, 0);
    int startIndex = blockData.getRevisions().indexOf(ContainerUtil.getFirstItem(selection));
    int endIndex = blockData.getRevisions().indexOf(ContainerUtil.getLastItem(selection));
    return new IntPair(startIndex, endIndex + 1);
  }
@NotNull
  private IntPair getSelectedRevisionsRange(@NotNull BlockData blockData)