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https://issues.apache.org/jira/browse/BEAM-9326?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17038154#comment-17038154
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Ismaël Mejía commented on BEAM-9326:
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Extra question related to the last point for [~kenn], What was the motivation
to make {{MapElements}} define {{<? extends InputT>}} for the input instead of
just {{InputT}}?
> JsonToRow transform should not use bounded Wildcards for its input
> ------------------------------------------------------------------
>
> Key: BEAM-9326
> URL: https://issues.apache.org/jira/browse/BEAM-9326
> Project: Beam
> Issue Type: Improvement
> Components: sdk-java-core
> Reporter: Ismaël Mejía
> Assignee: Ismaël Mejía
> Priority: Minor
> Fix For: 2.20.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The JsonToRow PTransform input is a String (a final class in Java) so no
> reason
> to define a bounded wildcard as its argument.
> We should use <? extends String> in Beam's codebase only when required by Java
> Generics constraints.
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