import { FormGroup } from '@angular/forms';
import { ValidationConfig } from '../models/validation-config';
export declare class ValidationService {
    private readonly config;
    constructor(config: ValidationConfig);
    private errorMessageListener;
    addErrorMessage(message: string): void;
    getSummaryMessageByField(field: string): string;
    validateForm(formGroup: FormGroup): string[];
    private addErrorByKey;
    getMessageByKey(key: string, fieldLabel: string): string;
}