Implement a one shot request with coroutines (Repository)

Repository.kt

class ProductsRepository(val productsDao: ProductsDao) {

  /**
    * This is a "regular" suspending function, which means the caller must
    * be in a coroutine. The repository is not responsible for starting or 
    * stopping coroutines since it doesn't have a natural lifecycle to cancel
    * unnecessary work.
    *
    * This *may* be called from Dispatchers.Main and is main-safe because
    * Room will take care of main-safety for us.
    */
   suspend fun loadSortedProducts(ascending: Boolean): List<ProductListing> {
       return if (ascending) {
           productsDao.loadProductsByDateStockedAscending()
       } else {
           productsDao.loadProductsByDateStockedDescending()
       }
   }
}