# onDone method

void onDone (void handleDone())

Replaces the done event handler of this subscription.

The `handleDone` function is called when the stream closes. The value may be `null`, in which case no function is called.

This method replaces the current handler set by the invocation of Stream.listen, by calling asFuture, or by a previous call to onDone.

## Implementation

    void onDone(void handleDone());