import { AbstractControl } from '@angular/forms';
export declare const maxFilesValidator: (maxFiles: number) => (control: AbstractControl) => {
    [key: string]: any;
};
export declare const maxSizeValidator: (maxSize: number) => (control: AbstractControl) => {
    [key: string]: any;
};
export declare const mimeTypeExtensionValidator: (mimeTypes: string[]) => (control: AbstractControl) => {
    [key: string]: any;
};