export declare class StateManager<E> {
    private readonly states;
    private current;
    private readonly val;
    constructor(states: E);
    is(state: keyof E): boolean;
    before(state: keyof E): any;
    after(state: keyof E): any;
    get(): any;
    set(state: keyof E, condition?: boolean | Function, value?: Record<string, any> | Function): this | NullStateManager;
    force(state: keyof E, condition?: boolean | Function, value?: Record<string, any> | Function): this | NullStateManager;
    value(val?: Record<string, any> | Function): {};
    then(fn: Function): this;
    else(fn: Function): this;
}
declare class NullStateManager {
    is(): this;
    before(): this;
    after(): this;
    set(): this;
    value(): any;
    then(): this;
    else(fn: Function): this;
}
export {};