/**
 * Mutation Observer Helper function -- see developer.mozilla.org/en-US/docs/Web/API/MutationObserver/observe
 *
 * @param {string} selector The DOM selector to watch
 * @param {object} opt MutationObserver options
 * @param {function} cb Pass Mutation object to a callback function
 * @private Not intended as public API and subject to change
 */
export declare const observe: (selector: any, opt: any, cb: any) => () => void;
export declare const getMutationObserver: (nodeSelector: string, cb: any) => () => void;
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