import type { Source, Track } from './types';
export declare function isTrack(arg: any): arg is Track;
export declare function isSource(arg: any): arg is Source;
type Obj = Record<string, any>;
export declare function deepUpdate(a: Obj, b: Obj): Obj;
export declare function fillTemplate(template: string, fillWith: Obj): string;
export declare function structuredClone(src: any): any;
export {};