import { PrivateConfigClass } from '../../../common/config/private/PrivateConfigClass';
/**
 * This class decouples the extension management and the config.
 * It helps to solve the "chicken and the egg" which should load first:
 *  Config or the extension as they have a circular dependency
 */
export declare class ExtensionConfigTemplateLoader {
    private static instance;
    private extensionList;
    private extensionTemplates;
    static get Instance(): ExtensionConfigTemplateLoader;
    /**
     * Loads a single extension template and adds it to the config
     * @param extFolder The folder name of the extension
     * @param config The config object to add the extension template to
     */
    loadSingleExtension(extFolder: string, config: PrivateConfigClass): void;
    loadExtensionTemplates(config: PrivateConfigClass): void;
    /**
     * Loads a single extension template
     * @param extFolder The folder name of the extension
     * @returns The extension template object if the extension is valid, null otherwise
     */
    private loadSingleExtensionTemplate;
    private getExtensionFolders;
    private setTemplatesToConfig;
}