[ Fix ]: App Crash when scroll to page 2 in Gallery Screen

[teaim]

When the first page is loaded, pageSize=75
https://api.unsplash.com/search/photos?query=Apple&page=1&per_page=75

When the second page is loaded, pageSize=25
https://api.unsplash.com/search/photos?query=Apple&page=2&per_page=25

Duplicate data on the first and second pages

FATAL EXCEPTION: main 
Process: com.google.samples.apps.sunflower, PID: 8802
java.lang.IllegalArgumentException: Key "P2X7NDx_GP0" was already used. If you are using LazyColumn/Row please make sure you provide a unique key for each item.

So App Crash when scroll to page 2 in Gallery Screen

Here's my solution, Specify the value of initialLoadSize explicitly

fun getSearchResultStream(query: String): Flow<PagingData<UnsplashPhoto>> {
      return Pager(
          config = PagingConfig(enablePlaceholders = false, pageSize = NETWORK_PAGE_SIZE, initialLoadSize = NETWORK_PAGE_SIZE),
          pagingSourceFactory = { UnsplashPagingSource(service, query) }
      ).flow
  }

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