Network Status Sealed Class in Kotlin without Erased Type problem

CategoryService.kt

    @ApolloExperimental
    override suspend fun getAllCategories(): CFlow<NetworkStatus<List<GetAllCategoriesQuery.Category>>> {
        return flow<NetworkStatus<List<GetAllCategoriesQuery.Category>>> {
            apolloClient.query(GetAllCategoriesQuery()).execute().collect {
                if (it.hasErrors()) {
                   emit( NetworkStatus.customStatusDetailed(ErrorCaseData(404, "Apollo Error", "APP")))
                }
                else {
                    emit(NetworkStatus.data<List<GetAllCategoriesQuery.Category>>(it.data?.category as List<GetAllCategoriesQuery.Category> ) )
                }
            }
        }.wrap()
    }

NetworkStatus.kt

package india.techrova.kmmapollotest.shared.data.api


sealed class NetworkStatus<T> {

    data class Loading<T>(var loading: Boolean) : NetworkStatus<T> ()

    data class CustomSignal<T>(var signal: String) : NetworkStatus<T>()

    data class CustomSignalDetailed<T>(var signal: ErrorCaseData) : NetworkStatus<T>()

    data class Failure<T>(val e: Throwable) : NetworkStatus<T>()

    data class Data<T> (val data: T ) : NetworkStatus<T>()

    companion object {

        fun <T>loading(isLoading: Boolean): NetworkStatus<T> = Loading(isLoading)

        fun <T> customstatus(signal: String): NetworkStatus<T> = CustomSignal(signal)

        fun <T> customStatusDetailed(signals: ErrorCaseData): NetworkStatus<T> = CustomSignalDetailed(signals)

        fun <T> failure(e: Throwable): NetworkStatus<T> = Failure(e)

        fun <T> data(data: T): NetworkStatus<T> = Data<T>(data)
    }

}