class SyntaxTree::MatchVisitor

def comments(node)
  return if node.comments.empty?
  q.nest(0) do
    q.text("comments: [")
    q.indent do
      q.breakable("")
      q.seplist(node.comments) { |comment| visit(comment) }
    end
    q.breakable("")
    q.text("]")
  end
end