import { AsyncValidatorFn, ValidatorFn } from '@angular/forms';
import { NgtReactiveFormValidationService } from "../../../../../services/validation/ngt-reactive-form-validation.service";
import * as i0 from "@angular/core";
export interface NgtReactiveTextareaValidationConfig {
    isRequired?: boolean;
    minLength?: number;
    maxLength?: number;
    customSyncValidators?: ValidatorFn[];
    customAsyncValidators?: AsyncValidatorFn[];
}
export declare class NgtReactiveTextareaValidationService {
    private reactiveFormValidationService;
    constructor(reactiveFormValidationService: NgtReactiveFormValidationService);
    getSyncValidators(config: NgtReactiveTextareaValidationConfig): ValidatorFn[];
    getAsyncValidators(config: NgtReactiveTextareaValidationConfig): AsyncValidatorFn[];
    static ɵfac: i0.ɵɵFactoryDeclaration<NgtReactiveTextareaValidationService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NgtReactiveTextareaValidationService>;
}