Why is BulkAd package private?

[DaanGroot-KSO]

We have a use case where we only need the adGroupId and ad from BulkAd, so in this case we don't care about the implementations of BulkAd. But since BulkAd is package private we cannot use it and have to cast the BulkAd objects to there implementation. Is there a particular reason why the BulkAd class is package private and would it be possible to make it public?

[qitia]

BulkAd is a not supposed to be used directly, you should use derived class for instance BulkProductAd.