har如何导出native方法？

// library/src/main/ets/utils/nativeTest.ets
import native from 'liblibrary.so';

export function nativeAdd(a: number, b: number): number {
  let result: number = native.add(a, b);
  return result;
}

// library/Index.ets
export { nativeAdd } from './src/main/ets/utils/nativeTest';
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