const cloud.google.com/go/storage.rfc3339Date

3 uses

	cloud.google.com/go/storage (current package)
		bucket.go#L393: 	rfc3339Date = "2006-01-02"
		bucket.go#L965: 			rr.Condition.CreatedBefore = r.Condition.CreatedBefore.Format(rfc3339Date)
		bucket.go#L999: 			r.Condition.CreatedBefore, _ = time.Parse(rfc3339Date, rr.Condition.CreatedBefore)

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