How to deal with extensions?

[LazloN5]

Hi,

I've been looking around but I couldn't find any clear answer. I have this custom message:
message CustomMessage { required uint32 conversationID = 1; extensions 2 to max; extend CustomMessage { optional Request request = 2; optional Response response = 2; } }

How do I add the Request to the message in typescript ?

[stale]

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