import { AugmentedItem, ImmutableAugmentedItem, Item } from '../../stores/items-store/interfaces';
import { CustomOpts, ProcCustomOpts } from './interfaces';
/**
 * Custom searcher. This searcher is used to filter items based on a custom function.
 */
export declare class CustomSearcher<T extends Item<T>> {
    constructor();
    /**
     * Processes the options.
     */
    processOptions(options: CustomOpts<T>): ProcCustomOpts<T>;
    /**
     * Checks if the given options are valid.
     */
    checkKeys(): boolean;
    /**
     * Filters items based on a custom function.
     */
    search(items: ImmutableAugmentedItem<T>[], options: ProcCustomOpts<T>): ImmutableAugmentedItem<T>[];
    /**
     * Filters items based on a custom function.
     */
    protected filterMatchingItemsUuids(fn: ProcCustomOpts<T>['customFn'], items: AugmentedItem<T>[]): ImmutableAugmentedItem<T>[];
}