We are using subclassed plugin to have different classes (let's say that 
each of them represents bank account type in different countries) with one 
underlying table. Bank account types can be identified with a X field in 
the table.

So when you get the request from a client you need to find bank account 
record in the table and create instance of a needed class.

Naive solutions is to just use a parent class, fetch the data, get the X 
field's value and the fetch the data again using the class X field 
represents. But that's two requests to DB, which is, while not bad, but 
still x2 times more reads.

One option I can think of is to have something like 
https://apidock.com/rails/ActiveRecord/Persistence/becomes.

Like this:

bc = BankAccountCanada.call(BankAccount[1].values)

Sequel's source code however says that 'It probably should not be used by 
external code". Which is sort of expected.

So - scary this can get? Any other options (except for polymorphic plugin)

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