import { AppHost, ExtensionItem, PrivateExtensionSlot, Shell, SlotKey, CustomExtensionSlot, CustomExtensionSlotHandler, PrivateAppHost } from './API';
export interface AnyExtensionSlot {
    readonly name: string;
    readonly declaringShell?: Shell;
}
interface ItemsDataStructure<T> {
    get(): ExtensionItem<T>[];
    add(item: ExtensionItem<T>): void;
    discardBy(predicate: (item: ExtensionItem<T>) => boolean): void;
}
export type CustomCreateExtensionSlot = <T>() => ItemsDataStructure<T>;
export interface CreateExtensionSlotOptions {
    declaringShell?: Shell;
    customCreateExtensionSlot?: CustomCreateExtensionSlot;
}
export declare function createExtensionSlot<T>(key: SlotKey<T>, host: PrivateAppHost, options?: CreateExtensionSlotOptions): PrivateExtensionSlot<T> & AnyExtensionSlot;
export declare function createCustomExtensionSlot<T>(key: SlotKey<T>, handler: CustomExtensionSlotHandler<T>, host: AppHost, declaringShell?: Shell): CustomExtensionSlot<T> & AnyExtensionSlot;
export {};
//# sourceMappingURL=extensionSlot.d.ts.map