| package sample | |
| // LightSwitch allows clients to manipulate a virtual light switch. | |
| type LightSwitch interface { | |
| // Status indicates whether the light is on or off. | |
| Status() (string, error) | |
| // FlipSwitch sets the light to on or off, depending on the input. | |
| FlipSwitch(toOn bool) (error) | |
| } |