import { BaseObserver, BaseListener, ListenerCounts, ListenerMetaManager, MetaBaseObserverInterface, MetaListener } from '@powersync/common';
/**
 * A BaseObserver that tracks the counts of listeners for each event type.
 */
export declare class MetaBaseObserver<Listener extends BaseListener> extends BaseObserver<Listener> implements MetaBaseObserverInterface<Listener> {
    protected get listenerCounts(): ListenerCounts<Listener>;
    get listenerMeta(): ListenerMetaManager<Listener>;
    protected metaListener: BaseObserver<MetaListener<Listener>>;
    constructor();
    registerListener(listener: Partial<Listener>): () => void;
}