/**
 * Calls a function only once during component lifecycle;
 * When dependency array is provided, will call the function again if at least one of the dependencies changed
 * @param callback The function to execute only once
 * @param dependencies A list of dependencies whose value, if changed since last call,
 * will trigger the execution of the callback
 */
export declare const useSingleton: (callback: () => any, dependencies?: any[]) => void;
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