export declare function loadJson<T>(url: string): Promise<T>;
export declare function loadCss(url: string, appendTo: Element | ShadowRoot): void;
export declare function loadJs(url: string): Promise<unknown>;
export declare function loadFont(family: string, url: string, d?: any): Promise<any>;
export declare function loadCustomFonts(customCss: string): Promise<PromiseSettledResult<any>[] | undefined>;
export declare function addVersionToUrl(url: string): string;
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