description

# removeOnExitListener method Null safety

void removeOnExitListener (

1. SendPort responsePort

)

Stops listening for exit messages from the isolate.

Requests for the isolate to not send exit messages on `responsePort`. If the isolate isn't expecting to send exit messages on `responsePort`, because the port hasn't been added using addOnExitListener, or because it has already been removed, the request is ignored.

If the same port has been passed via addOnExitListener more than once, only one call to `removeOnExitListener` is needed to stop it from receiving exit messages.

Closing the receive port that is associated with the `responsePort` does not stop the isolate from sending uncaught errors, they are just going to be lost.

An exit message may still be sent if the isolate terminates before this request is received and processed.

## Implementation

    external void removeOnExitListener(SendPort responsePort);