import { type DropdownConfig } from '../models/dropdown.model';
import { type FormOption } from '../models/signal-form.model';
import * as i0 from "@angular/core";
export declare class FormDropdownService {
    private dropdownRef?;
    private readonly appRef;
    private readonly injector;
    openDropdown<TOption extends FormOption<TValue>, TValue = TOption['value']>(config: DropdownConfig<TOption, TValue>): void;
    destroyDropdown(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<FormDropdownService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<FormDropdownService>;
}