HarmonyOS鸿蒙Next中Property 'getFileAssets' does not exist on type 'typeof media'

HarmonyOS鸿蒙Next中Property ‘getFileAssets’ does not exist on type ‘typeof media’

文档[@ohos.multimedia.mediaLibrary (媒体库管理)-媒体-接口参考（ArkTS及JS API）-手机、平板、智慧屏和智能穿戴开发-ArkTS API参考-HarmonyOS应用开发](https://developer.harmonyos.com/cn/docs/documentation/doc-references/js-apis-medialibrary-0000001281001130)中的demo

import media from '[@ohos](/user/ohos).multimedia.media';
import mediaLibrary from '[@ohos](/user/ohos).multimedia.mediaLibrary';

let fileKeyObj = mediaLibrary.FileKey;
let imageType = mediaLibrary.MediaType.IMAGE;
let imagesFetchOp = {
selections: fileKeyObj.MEDIA_TYPE + '= ?',
selectionArgs: [imageType.toString()],
};
media.getFileAssets(imagesFetchOp, (error, fetchFileResult) => {
if (fetchFileResult == undefined) {
console.error('Failed to get fetchFileResult: ' + error);
return;
}
const count = fetchFileResult.getCount();
if (count < 0) {
console.error('Failed to get count from fetchFileResult: count: ' + count);
return;
}
if (count == 0) {
console.info('The count of fetchFileResult is zero');
return;
}
console.info('Get fetchFileResult success, count: ' + count);
fetchFileResult.getFirstObject((err, fileAsset) => {
if (fileAsset == undefined) {
console.error('Failed to get first object: ' + err);
return;
}
console.log('fileAsset.displayName ' + ': ' + fileAsset.displayName);
for (let i = 1; i < count; i++) {
fetchFileResult.getNextObject((err, fileAsset) => {
if (fileAsset == undefined) {
console.error('Failed to get next object: ' + err);
return;
}
console.log('fileAsset.displayName ' + i + ': ' + fileAsset.displayName);
})
}
});
});

报错的内容如：Property ‘getFileAssets’ does not exist on type 'typeof media’