On 1/12/21 12:58 PM, cc wrote:

>      void send(T query, void delegate(T.RESPONSE) callback) {

That wants a delegate that takes a T.RESPONSE (PingResponse in this case). However, the following lambda is in fact a template:

>      send(PingQuery("helo"), (resp) {

You specify the type there and it works:

    send(PingQuery("helo"), (PingResponse resp) {

Ali

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