declare type NullOrUndefined = null | undefined;
export declare type Reducer<S = null, P = null, R = S extends NullOrUndefined ? null : P extends NullOrUndefined ? (state: S) => S : (state: S, payload: P) => S> = R;
export interface Handler<S = null, P = null> {
    readonly metaKey?: string;
    readonly type: string;
    readonly featureKey?: string;
    readonly reducer: Reducer<S, P>;
    readonly payload: P;
}
export declare type HandlerCreator<S = null, P = null, HC = P extends NullOrUndefined ? () => Handler<S, P> : (payload: P) => Handler<S, P>> = HC & {
    type: string;
};
export declare type Dispatch = (handler: Handler<any, any>) => void;
export declare type Selector<S, R> = (state: S) => R;
export {};