in plasma-stream/src/server/receiver.rs [154:163]
fn drop(&mut self) {
// ensure thread-safety by acquiring a lock to the set of objects being received;
// `unwrap()` is OK here because no thread will panic wile holding the lock.s
let mut receiving = self.receiving.lock().unwrap();
// remove all specified objects form the set
for oid in self.object_ids.iter() {
receiving.remove(oid);
}
}