import { ValidatorFn } from '@angular/forms';
import * as i0 from "@angular/core";
export interface NgtDropzoneValidationConfig {
    minItems: number;
    isRequired: boolean;
    customSyncValidators?: ValidatorFn[];
}
export declare class NgtReactiveDropzoneValidationService {
    getSyncValidators(config: NgtDropzoneValidationConfig): ValidatorFn[];
    static ɵfac: i0.ɵɵFactoryDeclaration<NgtReactiveDropzoneValidationService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NgtReactiveDropzoneValidationService>;
}