code: func NewMain() *Main {
  	return &Main{
  		Hosts:       []string{"localhost:9092"},
  		Topics:      []string{"test"},
  		Group:       "group0",
  		RegistryURL: "localhost:8081",
  		PilosaHosts: []string{"localhost:10101"},
  		Index:       "pdk",
  		BatchSize:   1000,
  		Proxy:       ":13131",
  	}
  }
docs: // NewMain returns a new Main.