code: private Node getSequence(IdSourceKey idSourceKey) {
  		String updateSequenceQuery = getQuery( idSourceKey );
  		Result result = neo4jDb.execute( updateSequenceQuery, singletonMap( SEQUENCE_NAME_QUERY_PARAM, (Object) sequenceName( idSourceKey ) ) );
  		ResourceIterator<Node> column = result.columnAs( "n" );
  		Node node = null;
  		if ( column.hasNext() ) {
  			node = column.next();
  		}
  		column.close();
  		return node;
  	}
docs: Given a {@link IdSourceKey}, get the corresponding sequence node.
  
  @param idSourceKey the {@link IdSourceKey} identifying the sequence
  @return the node representing the sequence