code: private void addSequences(Iterable<Sequence> sequences) {
  		Transaction tx = null;
  		try {
  			tx = neo4jDb.beginTx();
  			for ( Sequence sequence : sequences ) {
  				addSequence( sequence );
  			}
  			tx.success();
  		}
  		finally {
  			tx.close();
  		}
  	}
docs: Adds a node for each generator of type {@link IdSourceType#SEQUENCE}. Table-based generators are created lazily
  at runtime.
  
  @param identifierGenerators the generators to process