docs: private void applyProperties(AssociationKey associationKey, Tuple associationRow, Relationship relationship) {
  		String[] indexColumns = associationKey.getMetadata().getRowKeyIndexColumnNames();
  		for ( int i = 0; i < indexColumns.length; i++ ) {
  			String propertyName = indexColumns[i];
  			Object propertyValue = associationRow.get( propertyName );
  			relationship.setProperty( propertyName, propertyValue );
  		}
  	}