/**
 * Hook to initialize and return a constant value. Unlike `React.useMemo`, this is guaranteed to
 * always return the same value (and if the initializer is a function, only call it once).
 * This is similar to setting a private member in a class constructor.
 *
 * If the value should ever change based on dependencies, use `React.useMemo` instead.
 *
 * @param initialValue - Initial value, or function to get the initial value. Similar to `useState`,
 * only the value/function passed in the first time this is called is respected.
 * @returns The value. The identity of this value will always be the same.
 */
export declare function useConst<T>(initialValue: T | (() => T)): T;