test:

jensen.d.ts

 declare module 'jensen' {
-    type DeviceInfo = {
+    export type DeviceInfo = {
         sn: string;
         versionNumber: number;
         versionCode: string;
     };
-    type ReturnStruct = {
+    export type ReturnStruct = {
         common: { result: 'failed' | 'success' };
     };
     export type FileInfo = {