unregisterWorkerPoolListener method
Unregisters a callback.
Implementation
void unregisterWorkerPoolListener(
{Function(W worker, bool removed)? listener, Object? token}) {
if (token != null) {
_workerPoolListeners.remove(token);
} else if (listener != null) {
_workerPoolListeners.removeWhere((key, value) => value == listener);
}
}