import { Observable } from 'rxjs';
import { SelectOptionProvider } from './select-option-provider';
import { SelectOption } from './select-option';
import * as i0 from "@angular/core";
export declare class DelegateOptionProviderDirective implements SelectOptionProvider {
    delegate?: SelectOptionProvider;
    type(): "number" | "object" | "string" | "date";
    provide(search: string | null): Observable<SelectOption<any>[]>;
    label(value: any): string;
    trackBy(value: any): any;
    static ɵfac: i0.ɵɵFactoryDeclaration<DelegateOptionProviderDirective, never>;
    static ɵdir: i0.ɵɵDirectiveDeclaration<DelegateOptionProviderDirective, "mcl-select-autocomplete[delegate]", never, { "delegate": { "alias": "delegate"; "required": false; }; }, {}, never, never, true, never>;
}