import { Observable } from 'rxjs';
import { DokuSelectSearchMatcherFn } from '../select.component';
import { DokuSelectOptionItemRecord } from '../select.interface';
export declare class SearchUtil {
    static useSearchMatcher(items: DokuSelectOptionItemRecord[] | undefined, options: {
        bindLabel: string;
        search$: Observable<string>;
        searchable?: boolean;
        customSearchMatcherFn?: DokuSelectSearchMatcherFn;
    }): Observable<DokuSelectOptionItemRecord[]>;
    private static defaultSearchMatcherFn;
}