import { QuestionBase } from './question-base';
import { Observable, BehaviorSubject } from 'rxjs';
/**
 * Base class for any drop down of multiple select
 */
export declare class SelectQuestion<T> extends QuestionBase<T> {
    options: any[];
    options$: Observable<any[]> | BehaviorSubject<any[]> | any;
    selection: {
        key: string;
        value: string;
    };
    selectionFilter: {
        controlKey: string;
        filterKey: string;
        options$: (value: any) => Observable<any[]>;
    };
    defaultValue: boolean;
    emitObject: boolean;
    constructor(options?: {});
}