private static void lineDown(@NotNull MoveType type, @NotNull JTree tree) {
    TreePath lead = tree.getLeadSelectionPath();
    int row = tree.getRowForPath(lead);
    if (lead == null || row < 0) {
      selectFirstExceptSeparator(type, tree);
    }
    else {
      row = findRowExceptSeparator(tree, row, false); // NB!: increase row before checking for cycle scrolling
      if (isCycleScrollingAllowed(type) && row == tree.getRowCount()) row = 0;
      selectExceptSeparator(type, tree, row);
    }
  }
private static void lineDown(@NotNull MoveType type, @NotNull JTree tree)