import { type CleanupFn, type NonNullRef } from './react-ref.js';
import type { Maybe } from './utils.js';
/**
 * A {@link NonNullRef} with an associated {@link CleanupFn cleanup function} that has been stored after assigning to
 * it, or `null` if it has not been assigned yet.
 */
export type StoredRef<T> = {
    ref: NonNullRef<T>;
    cleanup: CleanupFn | null;
};
/**
 * @param storedRef Ref to assign the value to.
 * @param value Value to assign to the ref.
 *
 * **WARNING:** This function mutates the ref for performance reasons.
 */
export declare function assignToStoredRef<T>(storedRef: StoredRef<T>, value: T): void;
/**
 * @param storedRef Ref to cleanup.
 *
 * **WARNING:** This function mutates the ref for performance reasons.
 */
export declare function cleanupStoredRef<T>(storedRef: StoredRef<T>): void;
/**
 * @see StoredRef
 *
 * @param ref Original React ref to store.
 * @param maybeValue Optional initial value to store on the ref.
 * @returns A {@link StoredRef}.
 */
export declare function makeStoredRef<T>(ref: NonNullRef<T>, maybeValue: Maybe<T>): StoredRef<T>;
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