import { Observable } from 'rxjs';
import { TerraPagerInterface } from '../../../pager/data/terra-pager.interface';
import * as i0 from "@angular/core";
/**
 * @author chirila-ioan-daniel
 */
export declare abstract class TerraNestedDataPickerBaseService<T> {
    /**
     * @description Placeholder for the specific data-retrieval method. In General the specific rest call is given here.
     * @param parentId
     */
    abstract requestNestedData(parentId: string | number): Observable<TerraPagerInterface<T>>;
    /**
     * @description Placeholder for the specific single item retrieval method.
     * @param id
     */
    abstract requestNestedDataById(id: number): Observable<TerraPagerInterface<T>>;
    static ɵfac: i0.ɵɵFactoryDeclaration<TerraNestedDataPickerBaseService<any>, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<TerraNestedDataPickerBaseService<any>>;
}