import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare abstract class SvgLoadStrategy {
    abstract config(url: string): Observable<string>;
    abstract load(url: Observable<string>): Observable<string>;
    static ɵfac: i0.ɵɵFactoryDeclaration<SvgLoadStrategy, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SvgLoadStrategy>;
}