import { FormControl, FormGroupDirective, NgForm } from "@angular/forms";
import * as i0 from "@angular/core";
export declare class ErrorStateMatcher {
    isErrorState(control?: FormControl, form?: FormGroupDirective | NgForm): boolean;
    static ɵfac: i0.ɵɵFactoryDeclaration<ErrorStateMatcher, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<ErrorStateMatcher>;
}
