Incorrect example for ActiveModel::Observer#observed_classes

The example for ActiveModel::Observer#observed classes is:

   #   class AuditObserver < ActiveModel::Observer
   #     def self.observed_classes
   #       [AccountObserver, BalanceObserver]
   #     end
   #   end

but shouldn't it be:

   #   class AuditObserver < ActiveModel::Observer
   #     def self.observed_classes
   #       [Account, Balance]
   #     end
   #   end