classExtensionDoc = new ClassExtensionDoc(pluginId, classDoc);
                plugins.put(pluginId, classExtensionDoc);
            }
            classExtensionDoc.getExtensionClasses().put(extension.getExtensionId(), model.getClassDoc(extension.getExtensionClass()));
        }
        for (ClassExtensionDoc extensionDoc : plugins.values()) {
            build(extensionDoc);
            classDoc.addClassExtension(extensionDoc);