+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ const data = tail!.dequeue()
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ if (tail!.empty() && tail!.next != null) {
+ if (!tailChanged) {
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ this.tail = tail!.next
+ } else {
+ let node: PriorityQueueNode<T> | undefined = this.tail
+ while (node != null) {
+ if (node.next === tail) {
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ node.next = tail!.next
+ break
+ }
+ node = node.next
+ }
+ }
+ // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
+ delete tail!.next