protected override Task <MegafonContact> InvokeOnContact(MegafonCallbackOptions <THandler> options, ContactRequest request) { return(options.InvokeOnContact(_handler, request)); }
protected abstract Task <MegafonContact> InvokeOnContact(TOptions options, ContactRequest request);
protected override async Task <MegafonContact> InvokeOnContact(MegafonCallbackOptions options, ContactRequest request) { return(await options.InvokeOnContact(request)); }