conference.rb in twilio-ruby-5.0.0.rc25

- old
+ new

@@ -291,11 +291,14 @@
               )
             end
 
             ##
             # Access the participants
-            # @return [ParticipantList] ParticipantList
+            # @return [ParticipantList] if a(n) ParticipantList object was created.
+            # @return [ParticipantContext] if a(n) ParticipantContext object was created.
             def participants(call_sid=:unset)
+              raise ArgumentError, 'call_sid cannot be nil' if call_sid.nil?
+
               if call_sid != :unset
                 return ParticipantContext.new(
                     @version,
                     @solution[:account_sid],
                     @solution[:sid],
\ No newline at end of file