import type { StateObserver } from "./types";
import type { StateEvent } from "../../storage/types";
import type { Transaction } from "../../storage/idb/Transaction";
import { ObservableMap } from "../../../observable/map";
/**
 * Observable map for a given type with state keys as map keys.
 * Unsubscribes when last subscription is removed */
export declare class ObservedStateTypeMap extends ObservableMap<string, StateEvent> implements StateObserver {
    private readonly type;
    private removeCallback?;
    constructor(type: string);
    /** @internal */
    load(roomId: string, txn: Transaction): Promise<void>;
    /** @internal */
    handleStateEvent(event: StateEvent): void;
    setRemoveCallback(callback: () => void): void;
    onUnsubscribeLast(): void;
}