private static void ValidateInputs(string connectionString, string topicName, string subscriptionName,
                                    IRetryPolicy retryPolicy)
 {
     connectionString.GuardArgumentIsNotNullOrEmpty(nameof(connectionString));
     topicName.GuardArgumentIsNotNullOrEmpty(nameof(topicName));
     subscriptionName.GuardArgumentIsNotNullOrEmpty(nameof(subscriptionName));
     retryPolicy.GuardArgumentIsNotNull(nameof(retryPolicy));
 }