From a1edb0116d34dc2d2e21a9cb00bcf352bf748284 Mon Sep 17 00:00:00 2001
From: Ya Zhuang <zhuangya@users.noreply.github.com>
Date: Tue, 24 Dec 2024 15:57:26 +0800
Subject: [PATCH] capturenull returns in type definitions for v5

ref: #69
---
 src/priorityQueue.d.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/priorityQueue.d.ts b/src/priorityQueue.d.ts
index 4074e89..174edde 100644
--- a/src/priorityQueue.d.ts
+++ b/src/priorityQueue.d.ts
@@ -12,10 +12,10 @@ export abstract class PriorityQueue<T> {
   constructor(options?: PriorityQueueOptions<T>);
   size(): number;
   isEmpty(): boolean;
-  front(): PriorityQueueItem<T>;
-  back(): PriorityQueueItem<T>;
+  front(): PriorityQueueItem<T> | null;
+  back(): PriorityQueueItem<T> | null;
   enqueue(element: T, priority?: number): PriorityQueue<T>;
-  dequeue(): PriorityQueueItem<T>;
+  dequeue(): PriorityQueueItem<T> | null;
   toArray(): PriorityQueueItem<T>[];
   clear(): void;
 }