STI type value mapping

I have never used STI with AR but I am now considering it. My question has to do with the
Base.inheritance_column. According to the api docs:

Active Record allows inheritance by storing the name of the class in a
column that by default is named “type” (can be changed by overwriting
class Transaction < ActiveRecord::Base
class ArClientInvoice < Transaction


Can one assign a value within the subclass to use in the `inheritance_column in place of the class name? For example, given:

Is there any way to arbitrarily set ArClientInvoice.type to “ARIN” for all occurrences and to have Active record use this for STI purposes in place of “``ar_client_invoice”? The use case for this is for compatibility with a non-Rails application.

The simple answer is to rename the class to `
ARIN < ActiveRecord::Base


I had previously found this method referred to in an older API document but it was marked as being deprecated/removed in later version of Rails.
Does this still work and if so is it going to be removed or replaced with something else?

# File activerecord/lib/active_record/inheritance.rb, line 134
def sti_name
  store_full_sti_class ? name : name.demodulize