export type Listener<T> = (state: T) => void;
export type Selector<T, U> = (state: T) => U;
export declare class Store<T extends object> {
    private state;
    private listeners;
    constructor(initialState: T);
    getState(): T;
    setState(partial: Partial<T> | ((state: T) => Partial<T>)): void;
    subscribe(listener: Listener<T>): () => void;
    private notify;
    select<U>(selector: Selector<T, U>): U;
}
export declare function createStore<T extends object>(initialState: T): Store<T>;