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https://issues.apache.org/jira/browse/BEAM-2980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16176119#comment-16176119
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Aljoscha Krettek commented on BEAM-2980:
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I think this is a more specific version of BEAM-2975.
> BagState.isEmpty needs a tighter spec
> -------------------------------------
>
> Key: BEAM-2980
> URL: https://issues.apache.org/jira/browse/BEAM-2980
> Project: Beam
> Issue Type: Bug
> Components: beam-model
> Reporter: Kenneth Knowles
> Assignee: Kenneth Knowles
>
> Consider the following:
> {code}
> BagState<X> myBag = // empty
> ReadableState<Boolean> isMyBagEmpty = myBag.isEmpty();
> myBag.add(bizzle);
> bool empty = isMyBagEmpty.read();
> {code}
> Should {{empty}} be true or false? We need a consistent answer, across all
> kinds of state, when snapshots are required.
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