/**
 * Make sure only 1 define call is made for an element.
 * @param name
 * @param def
 * @returns
 */
export declare const define: (name: string, def: any) => void;
export declare const status: (name: string) => 'error' | 'inProgress' | 'none' | 'inRegistry';
export declare const whenDefined: (name: string) => Promise<CustomElementConstructor>;
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