docs: public ServiceFuture<ManagedBackupShortTermRetentionPolicyInner> beginCreateOrUpdateAsync(String resourceGroupName, String managedInstanceName, String databaseName, Integer retentionDays, final ServiceCallback<ManagedBackupShortTermRetentionPolicyInner> serviceCallback) {
          return ServiceFuture.fromResponse(beginCreateOrUpdateWithServiceResponseAsync(resourceGroupName, managedInstanceName, databaseName, retentionDays), serviceCallback);
      }