1| Change Type | Old Version | New Version | d.ts File | 2| ---- | ------ | ------ | -------- | 3|Added|NA|Class name: Callback;<br>Method or attribute name: (data: T): void;|@ohos.base.d.ts| 4|Added|NA|Class name: ErrorCallback;<br>Method or attribute name: (err: T): void;|@ohos.base.d.ts| 5|Added|NA|Class name: AsyncCallback;<br>Method or attribute name: (err: BusinessError\<E>, data: T): void;|@ohos.base.d.ts| 6|Added|NA|Class name: BusinessError;<br>Method or attribute name: code: number;|@ohos.base.d.ts| 7|Added|NA|Class name: BusinessError;<br>Method or attribute name: data?: T;|@ohos.base.d.ts| 8