/**
 * @fileoverview
 * @author Taketoshi Aono
 */
import { Observable } from 'rxjs';
export interface SubjectPayload<Type extends string, Payload, States = {}> {
    type: Type;
    states: States;
    payload: Payload;
    dispatch(key: string, args: any): void;
}
export declare class SubjectTree {
    private subject;
    private state;
    private preservation;
    private shouldImmediateDispatch;
    private lastDispatched;
    private histories;
    private subscribers;
    setState(state: any): void;
    subscribe(callback: (a: {
        type: string;
        payload: any;
    }) => void): void;
    unsubscribe(callback: any): void;
    unsubscribeAll(): void;
    notify<Payload>(payload: {
        type: string;
        payload: Payload;
    }): void;
    readonly observable: Observable<any>;
    getLastDispatched(): {
        type: string;
        payload: any;
    } | null;
    private notifySubscribers;
    private doNotify;
    private findHistory;
    private createSubjectPayload;
}