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Revert "Remove renderPhaseUpdates Map (#17484)" (#17623)

This reverts commit 8a347ed024159a5307172ea633a4561160f4a6b9.
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Dan Abramov committed
f42431abe1a31a3798989a6477422c492cf8dac1
Parent: 0b5a26a
Committed by GitHub <noreply@github.com> on 12/16/2019, 7:03:00 PM