Delegations are not inherited

[opensourceame]

class ParentService < Servitium::Service
  context do
    attribute :car
  end

  delegate :car, to: :context

  def perform
    puts car
  end
end

class ChildService < ParentService
  def perform
    puts car
  end
end

ParentService.perform(car: 'Ferrari')
ChildService.perform(car: 'Lada')

expected output:

Ferrari
Lada

actual output:

Ferrari
NameError: undefined local variable or method 'car' for an instance of Servitium::Context