/** A function that takes no arguments and returns no value. */
type IntervalFn = () => void;

/**
 * A utility class for managing intervals created by `setInterval`.
 */
declare class SetInterval {
    /** An object to store interval IDs keyed by string identifiers. */
    private intervalIds;
    /**
     * Starts a new interval that calls the specified function at the specified interval.
     * @param fn The function to call.
     * @param interval The interval (in milliseconds) at which to call the function.
     * @param key A unique string identifier for the interval.
     */
    start(fn: IntervalFn, interval: number, key: string): void;
    /**
     * Stops the interval with the specified key.
     * @param key The string identifier for the interval to stop.
     */
    clear(key: string): void;
    /**
     * Stops all intervals managed by this utility.
     */
    clearAll(): void;
    /**
     * Gets an array of all keys currently being used to manage intervals.
     * @returns An array of string keys.
     */
    listAll(): string[];
}
declare const _default: SetInterval;

export { _default as default };