paying with func action

protected Func<string, RestExecutor> getRestClient => delegate (string url)
        {
            var executor = RestExecutor.Prepare(url);
            return executor;
        };

    private  bool  SendVoipHttpRequest(Func<string,RestExecutor>getClient,VoipRecord recordMessage,string url)
        {
            //var client = RestExecutor.Prepare(url);
            var client = getClient(url);
            client.AddCustomHeader("user-agent", "Apache - HttpClient / 4.1.1(java 1.5)");
            client.AddCustomHeader("Content-Type", "application/json");
            client.AddCustomHeader("Host","cti-2-2");
            client.AddQueryParameter("req", "AddRecord");

            var path = string.Format(Constants.Path, recordMessage.CallingListName);
            var jsonBody = JsonConvert.SerializeObject(recordMessage);
            var response = client.Post<int, RestError>(path,jsonBody);
            return response.IsSuccessful;

        }