class SyntaxTree::Paren

def format(q)
  contents = self.contents
  q.group do
    q.format(lparen)
    if contents && (!contents.is_a?(Params) || !contents.empty?)
      q.indent do
        q.breakable_empty
        q.format(contents)
      end
    end
    q.breakable_empty
    q.text(")")
  end
end