Pull request #1888: 无jira任务 refactor: 修改声明

Merge in VISUAL/fineui from ~KIRA/fineui:master to master

* commit 'fbc550874346d9bb26da1380547b2d23413170fe':
  无jira任务 refactor: 修改声明
  无jira任务 refactor: 修改声明
  无jira任务 fix: 参数写错了

typescript/core/ob.ts

@@ -23,7 +23,7 @@ export interface _OB {
 
     once(eventName: string, fn: Function): void;
 
-    un(eName: string, fn: Function): void;
+    un(eName: string, fn?: Function): void;
 
     _initRef(): void;