void addSubClass(ClassDoc subClass) {
        subClasses.add(subClass)
    }
    ClassDoc mergeContent() {
        classProperties.sort { it.name }
        classMethods.sort { it.metaData.overrideSignature }
        classBlocks.sort { it.name }
        classExtensions.sort { it.pluginId }
        return this
    }

    String getStyle() {
        return classMetaData.groovy ? 'groovydoc' : 'javadoc'
    }