for (final String referencerUuuid : refRefs.get(propertyName)) {
Node referencer = this.resolver.getNode(referencerUuuid);
if (referencer == null) {
UnresolvedReference unresolvedReferencer = this.resolver.addUnresolvedReference(referencerUuuid);
unresolvedReferencer.addReference(propertyName, entry.getKey());
} else {
if (referencer.hasProperty(propertyName)) {
Property prop = referencer.getProperty(propertyName);
if (prop.isMultiple()) {