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This tests some of the normative changes in https://github.com/tc39/proposal-temporal/pull/2245, which achieved consensus in the July 2022 TC39 meeting, specifically as they apply to places where the MergeLargestUnitOperation was called. Due to the use of the pre-existing spec operation CopyDataProperties, the order of observable property operations has changed from a batch of [[GetOwnProperty]] followed by a batch of [[Get]], to a series of interleaved [[GetOwnProperty]]/[[Get]] pairs. This previously wasn't tested because TemporalHelpers.propertyBagObserver didn't track [[GetOwnProperty]] operations, but now it does.