import { MenuSectionContent as SerializableMenu } from '@stack-spot/portal-extension-commons';
import { MenuSectionContent } from '@stack-spot/portal-layout';
type Listener = (value: MenuSectionContent | undefined) => void;
declare class ExtensionMenu {
    private current;
    private listeners;
    /**
     * Slug and url of the extension currently controlling the menu.
     */
    controlledBy?: {
        slug: string;
        url: string;
    };
    private static deserializeMenuItem;
    private static deserializeMenu;
    private static fixRelativeUrls;
    /**
     * Changes the current menu.
     * @param menu the new menu.
     */
    set(menu: SerializableMenu | undefined): void;
    /**
     * Observes changes in the menu.
     * @param listener a function to call whenever the menu changes.
     * @returns a function that, when called, removes the listener.
     */
    onChange(listener: Listener): () => void;
    get(): MenuSectionContent | undefined;
}
export declare const extensionMenu: ExtensionMenu;
export declare function useExtensionMenu(): MenuSectionContent | undefined;
export {};
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