@Override
public AttributeHandler createHandler(TreeStructure tree, Instantiator instantiator, boolean circularityCheck) {
ClassMap<MethodInvoker> coll = MethodInvokerClassMaps.create(collections, instantiator);
ClassMultiMap<MethodInvoker> cont = MethodInvokerClassMaps.createMulti(contributions, instantiator);
return new CollectedAttributeHandler(getName(), coll, cont, tree);
}