PropertyDoc forClass(ClassDoc referringClass, Collection<ExtraAttributeDoc> additionalValues) {
        def refererMetaData = referringClass.classMetaData
        if (refererMetaData == this.referringClass && additionalValues.isEmpty()) {
            return this
        }
        return new PropertyDoc(refererMetaData, metaData, comment, additionalValues as List)
    }

    String getId() {
        return id
    }