You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: sign_in_phone_selection_presenter.rb
    path of file: ./repos/identity-idp/app/presenters/two_factor_authentication
    
    the code of the file until where you have to start completion: module TwoFactorAuthentication
  class SignInPhoneSelectionPr
    
    def disabled?
      case delivery_method
      when :sms
        OutageStatus.new.vendor_outage?(:sms)
      when :voice
        OutageStatus.new.vendor_outage?(:voice)
      else
        OutageStatus.new.all_phone_vendor_outage?
      end