docs: @Override
    public Void scan(Tree tree, VisitorState state) {
      if (tree == null) {
        return null;
      }
  
      SuppressionInfo prevSuppressionInfo = updateSuppressions(tree, state);
      try {
        return super.scan(tree, state);
      } finally {
        // Restore old suppression state.
        currentSuppressions = prevSuppressionInfo;
      }
    }