In Combine how do you make a publisher that sends one value but never completes?

In the following code receiveCompletion gets called but I don't want it to:

```swift
Just(1)
    .sink(
        receiveCompletion: {
            print("Completion: \($0)")
    },
        receiveValue: {
            print("Value: \($0)")
    }
)

```

How can I emit just one value but not complete...?