如何获取APP的版本名称？

import bundleManager from '@ohos.bundle.bundleManager'; 
import { BusinessError } from '@ohos.base'; 
import hilog from '@ohos.hilog'; 
let bundleFlags = bundleManager.BundleFlag.GET_BUNDLE_INFO_WITH_REQUESTED_PERMISSION; 
try { 
  let data = bundleManager.getBundleInfoForSelfSync(bundleFlags); 
  console.log('testTag', 'getBundleInfoForSelfSync successfully: %{public}s', JSON.stringify(data)); 
} catch (err) { 
  let message = (err as BusinessError).message; 
  console.log( 'testTag', 'getBundleInfoForSelfSync failed: %{public}s', message); 
}