code: public void removeAssociation(GraphDatabaseService executionEngine, AssociationKey associationKey) {
  		executionEngine.execute( removeAssociationQuery, params( associationKey.getEntityKey().getColumnValues() ) );
  	}
docs: Removes the relationship(s) representing the given association. If the association refers to an embedded entity
  (collection), the referenced entities are removed as well.
  
  @param executionEngine the {@link GraphDatabaseService} used to run the query
  @param associationKey represents the association