code: public ServiceFuture<List<LongTermRetentionBackupInner>> listByDatabaseAsync(final String locationName, final String longTermRetentionServerName, final String longTermRetentionDatabaseName, final Boolean onlyLatestPerDatabase, final LongTermRetentionDatabaseState databaseState, final ListOperationCallback<LongTermRetentionBackupInner> serviceCallback) {
          return AzureServiceFuture.fromPageResponse(
              listByDatabaseSinglePageAsync(locationName, longTermRetentionServerName, longTermRetentionDatabaseName, onlyLatestPerDatabase, databaseState),
              new Func1<String, Observable<ServiceResponse<Page<LongTermRetentionBackupInner>>>>() {
                  @Override
                  public Observable<ServiceResponse<Page<LongTermRetentionBackupInner>>> call(String nextPageLink) {
                      return listByDatabaseNextSinglePageAsync(nextPageLink);
                  }
              },
              serviceCallback);
      }
docs: Lists all long term retention backups for a database.
  
  @param locationName The location of the database
  @param longTermRetentionServerName the String value
  @param longTermRetentionDatabaseName the String value
  @param onlyLatestPerDatabase Whether or not to only get the latest backup for each database.
  @param databaseState Whether to query against just live databases, just deleted databases, or all databases. Possible values include: 'All', 'Live', 'Deleted'
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object