in responses.go [107:118]
func (res *WebhookResponse) AddOutputAudioTextResponse(ssml string) {
res.initializeFulfillments()
respMessage := &cx.ResponseMessage{}
respMessage.Message = &cx.ResponseMessage_OutputAudioText_{
OutputAudioText: &cx.ResponseMessage_OutputAudioText{
Source: &cx.ResponseMessage_OutputAudioText_Ssml{
Ssml: ssml,
},
},
}
res.FulfillmentResponse.Messages = append(res.FulfillmentResponse.Messages, respMessage)
}