PopularMoviesViewModel.kt

class PopularMoviesViewModel @ViewModelInject constructor(
    private val repository: MoviesRepository
) : ViewModel() {

   fun getPopularMovies(): Flow<PagingData<Movie>> {
        return Pager(
            config = PagingConfig(pageSize = PAGE_SIZE, enablePlaceholders = false),
            pagingSourceFactory = { PopularMoviesPagingSource(repository) }
        ).flow
          .cachedIn(viewModelScope)
    }

    companion object {
        const val PAGE_SIZE = 20
    }
}