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kotlinlang

Looking at <https://www.apollographql.com/docs/kotlin/fetching/defer/|defer>, is there any docs on how to know the loading and error states of the field? i.e. if we @defer on a nullable type, how could we distinguish between it `null`  (not defined) and presently null?

i guess if we want to shimmer a carousel of product cards until it loads, if both emissions are `null`, then our shimmer state will remain. unless we begin counting emissions

is there a context variable we can use to distinguish emissions

on `ApolloResponse` there is a `isLast` property that you may be able to use for this?

(note that `@defer` is only applicable on fragments)

yeah. thats fine with fragments. `isLast` - would that work with multiple `@defer` - i.e. will server send back X number of responses for each `@defer` or will we get only a single secondary response

you may get several ( &gt; 2) responses, and only the last one will have it set to true

Following up here - if the second request fails for some reason (server error, null ability, etc) how would we know? 

errors are treated the same as usual with defer: you'll get an exception if it's a network issue, or you may get something in `ApolloResponse.errors` for other cases