DRb::DRbObject#method_missing

# File tmp/rubies/ruby-3.1.3/lib/drb/drb.rb, line 1134
               def method_missing(msg_id, *a, &b)
  if DRb.here?(@uri)
    obj = DRb.to_obj(@ref)
    DRb.current_server.check_insecure_method(obj, msg_id)
    return obj.__send__(msg_id, *a, &b)
  end

  succ, result = self.class.with_friend(@uri) do
    DRbConn.open(@uri) do |conn|
      conn.send_message(self, msg_id, a, b)
    end
  end

  if succ
    return result
  elsif DRbUnknown === result
    raise result
  else
    bt = self.class.prepare_backtrace(@uri, result)
    result.set_backtrace(bt + caller)
    raise result
  end
end