in responses.go [120:131]
func (res *WebhookResponse) AddTelephonyTransferResponse(phnum string) {
res.initializeFulfillments()
respMessage := &cx.ResponseMessage{}
respMessage.Message = &cx.ResponseMessage_TelephonyTransferCall_{
TelephonyTransferCall: &cx.ResponseMessage_TelephonyTransferCall{
Endpoint: &cx.ResponseMessage_TelephonyTransferCall_PhoneNumber{
PhoneNumber: phnum,
},
},
}
res.FulfillmentResponse.Messages = append(res.FulfillmentResponse.Messages, respMessage)
}