CachedUserInfoRepository.kt

class UserInfoRepository(
    private val userInfoLocalDataSource: LocalDataSource<String, UserInfoDataModel>,
    private val userInfoRemoteDataSource: RemoteDataSource<UserInfoDataModel>
) : CachePolicyRepository<UserInfoDataModel>(
    localDataSource = userInfoLocalDataSource,
    remoteDataSource = userInfoRemoteDataSource
) {
    suspend fun get(key:String, cachePolicy: CachePolicy): UserInfoDomainModel {
        val userInfo:UserInfo? = cacheFetch(key, cachePolicy)
        // Do your mapping, etc. and return domain model
    }
}