/**
 * Dimmer state management inspired by Material UI's ModalManager (https://github.com/mui-org/material-ui)
 */
export default class DimmerManager {
    /**
     * Dimmer refs
     */
    private dimmers;
    constructor();
    add(dimmer: Element): number;
    remove(dimmer: Element): number;
    isTop(dimmer: Element): boolean;
}
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