code: func newSimulationNetwork() *simulations.Network {
  
  	s := NewSimulation()
  	services := adapters.Services{
  		"overlay": s.NewService,
  	}
  	adapter := adapters.NewSimAdapter(services)
  	simNetwork := simulations.NewNetwork(adapter, &simulations.NetworkConfig{
  		DefaultService: "overlay",
  	})
  	return simNetwork
  }
docs: //create the simulation network