GitHub user mariapython opened a pull request:
https://github.com/apache/beam/pull/3027
[BEAM-2241] Mark PipelineVisitor and AppliedPTransform as internal.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/mariapython/incubator-be
Github user asfgit closed the pull request at:
https://github.com/apache/beam/pull/3027
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