(rdb:1) p Array === obj
false
(rdb:1) p Array === obj.to_a
true
(rdb:1) p obj.class
Array
(rdb:1) p obj.to_a.class
Array
(rdb:1) p obj.to_a.class.object_id
15567540
(rdb:1) p obj.class.object_id
15567540
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