    # File lib/active_merchant/billing/credit_card_methods.rb, line 75
            def type?(number)
              return 'bogus' if valid_test_mode_card_number?(number)

              card_companies.reject { |c,p| c == 'maestro' }.each do |company, pattern|
                return company.dup if number =~ pattern
              end

              return 'maestro' if number =~ card_companies['maestro']

              return nil
            end