import { ExtensionItem } from '../src/API';
interface Signal<T> {
    get(): T;
    set(value: T): void;
}
export declare const createSignalItemsDataStructure: () => {
    createDataStructure: <U>() => {
        get: () => ExtensionItem<U>[];
        add: (item: ExtensionItem<U>) => void;
        discardBy: (predicate: (item: ExtensionItem<U>) => boolean) => void;
    };
    getSignalToTrack: () => Signal<ExtensionItem<any>[]>;
    effect: (fn: () => void) => (() => void);
};
export {};
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