/**
 * This will perform a shallow merge of the given state object
 * with the state coming from props
 * (for the controlled component scenario)
 * This is used in state updater functions so they're referencing
 * the right state regardless of where it comes from.
 *
 * @param state The state of the component/hook.
 * @param props The props that may contain controlled values.
 * @returns The merged controlled state.
 */
export declare function getState<S extends object>(state: S, props?: Partial<S>): S;