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https://issues.apache.org/jira/browse/BEAM-1495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15868989#comment-15868989
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Thomas Groh commented on BEAM-1495:
-----------------------------------

It is worth instead considering implementing ParDo.Bound purely in terms of 
ParDo.BoundMulti, and having a PrimitiveParDoSingle override factory for a 
runner who wishes to implement it as a single-output primitive. This allows us 
to cut out ParDo.Bound out of the set of primitives.

[~kenn]

> Move ParDo.Bound as ParDo.BoundMulti into the core runners construction module
> ------------------------------------------------------------------------------
>
>                 Key: BEAM-1495
>                 URL: https://issues.apache.org/jira/browse/BEAM-1495
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-core
>            Reporter: Thomas Groh
>            Priority: Minor
>              Labels: starter
>
> This is a reasonable runner-independent override.



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