Pass getattr calls in AbstractDoFnWrapper to the wrapped dofn for stateful dofns.

[jonathanasdf]

Otherwise there is an error

  File "/private/tmp/beam/sdks/python/apache_beam/transforms/userstate.py", line 304, in validate_stateful_dofn
    if (timer_spec._attached_callback != getattr(dofn, method_name,
AttributeError: 'NoneType' object has no attribute '__func__'

R: @charlesccychen

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[jonathanasdf]

R: @charlesccychen

[github-actions]

Stopping reviewer notifications for this pull request: review requested by someone other than the bot, ceding control

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This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time and @mention a reviewer or discuss it on the dev@beam.apache.org list. Thank you for your contributions.

[jonathanasdf]

bump

[AnandInguva]

I will go ahead and review this. I suspect the reviewer you tagged is not active in Beam

[jonathanasdf]

Thanks, it was the only choice from https://github.com/apache/beam/blob/master/sdks/python/apache_beam/typehints/OWNERS maybe that should be updated.

[github-actions]

This pull request has been marked as stale due to 60 days of inactivity. It will be closed in 1 week if no further activity occurs. If you think that’s incorrect or this pull request requires a review, please simply write any comment. If closed, you can revive the PR at any time and @mention a reviewer or discuss it on the dev@beam.apache.org list. Thank you for your contributions.

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This pull request has been closed due to lack of activity. If you think that is incorrect, or the pull request requires review, you can revive the PR at any time.

[AnandInguva]

@jonathanasdf Hi sorry, This was slipped from my plate. Is this still relevant?