voice.rb in twilio-ruby-5.0.0.rc25

- old
+ new

@@ -25,12 +25,15 @@
           end
 
           ##
           # Access the numbers
           # @param [String] number The number
-          # @return [NumberList] NumberList
+          # @return [NumberList] if a(n) NumberList object was created.
+          # @return [NumberContext] if a(n) NumberContext object was created.
           def numbers(number=:unset)
+            raise ArgumentError, 'number cannot be nil' if number.nil?
+
             if number != :unset
               return NumberContext.new(
                   @version,
                   number,
               )
@@ -42,11 +45,14 @@
           end
 
           ##
           # Access the countries
           # @param [String] iso_country The iso_country
-          # @return [CountryList] CountryList
+          # @return [CountryList] if a(n) CountryList object was created.
+          # @return [CountryContext] if a(n) CountryContext object was created.
           def countries(iso_country=:unset)
+            raise ArgumentError, 'iso_country cannot be nil' if iso_country.nil?
+
             if iso_country != :unset
               return CountryContext.new(
                   @version,
                   iso_country,
               )
\ No newline at end of file