import { ValidationErrors } from '@angular/forms';
import * as i0 from "@angular/core";
export declare class NgxErrorMessageService {
    private readonly config;
    private readonly translate;
    getErrorMessage(controlErrors: ValidationErrors, patternKey?: string, fieldName?: string): string;
    private patternMatchExpression;
    private getValueByRegexFromObject;
    private interpolateMessage;
    private getNestedMessage;
    private getMessage;
    static ɵfac: i0.ɵɵFactoryDeclaration<NgxErrorMessageService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NgxErrorMessageService>;
}