/**
Script loader
 */
export class ScriptLoader {
    static instance: any;
    static getInstance(contentBase: any): any;
    constructor(contentBase: any);
    scripts: {};
    contentBase: any;
    /**
    Add a script to load path
    @param script url to load the script from
     */
    add(script: any): this;
    /**
    Load all scripts
    @param parallel default false - wait for each one to load before loading the next one
     */
    load(parallel?: boolean): Promise<void>;
    loadScript(path: any, parallel: any): Promise<any>;
    /**
    Utility method - load a script and append it to document head
    @param urls array containing URLs of scripts
    @param parallel optionally load in parallel
    */
    loadScriptsToDocument(urls: any, parallel: any): Promise<void>;
    addScript(url: any): void;
}