code: public void delete(String locationName, String longTermRetentionServerName, String longTermRetentionDatabaseName, String backupName) {
          deleteWithServiceResponseAsync(locationName, longTermRetentionServerName, longTermRetentionDatabaseName, backupName).toBlocking().last().body();
      }
docs: Deletes a long term retention backup.
  
  @param locationName The location of the database
  @param longTermRetentionServerName the String value
  @param longTermRetentionDatabaseName the String value
  @param backupName The backup name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent