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<rdar://problem/66436701>
UNUM_DURATION + unum will be used possibly.
Or skeleton with units?
unumberformatter + pruralrules + listformat. So, this requires ICU 67 (ListFormat).
ListFormat is stabilized, so it is unblocked.
Now, it gets stage 3.
Pull request: https://github.com/WebKit/WebKit/pull/4589
Committed 254791@main (0a1408274330): <https://commits.webkit.org/254791@main> Reviewed commits have been landed. Closing PR #4589 and removing active labels.