lib/twilio-ruby/rest/preview/proxy.rb in twilio-ruby-5.0.0.rc24 vs lib/twilio-ruby/rest/preview/proxy.rb in twilio-ruby-5.0.0.rc25

@@ -15,10 +15,12 @@
           @version = 'Proxy'
           @services = nil
         end
 
         def services(sid=:unset)
-          if sid == :unset
+          if sid.nil?
+            raise ArgumentError, 'sid cannot be nil'
+          elsif sid == :unset
             @services ||= ServiceList.new self
           else
             ServiceContext.new(self, sid)
           end
         end
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