private void refreshMergeInfo(@NotNull RootsAndBranches action) {
    if (myMergeInfoUpdatesListener == null) {
      myMergeInfoUpdatesListener = new MergeInfoUpdatesListener(myVcs.getProject(), myConnection);
    }
    myMergeInfoUpdatesListener.addPanel(action);
  }
private void refreshMergeInfo(@NotNull RootsAndBranches action)