import { FormControl, FormGroupDirective } from '@angular/forms';
import { ErrorStateMatcher } from '@angular/material/core';
import { ErrorStateMode } from '../enums';
export declare class BmErrorStateMatcher implements ErrorStateMatcher {
    private mode;
    constructor(mode: ErrorStateMode);
    isErrorState(control: FormControl | null, form: FormGroupDirective | null): boolean;
}