import { UmbLitElement } from '../../lit-element/index.js';
declare const UmbInputExtensionElement_base: import("../../../../libs/extension-api/index.js").HTMLElementConstructor<import("../../validation/index.js").UmbFormControlMixinElement<string | undefined>> & typeof UmbLitElement;
export declare class UmbInputExtensionElement extends UmbInputExtensionElement_base {
    #private;
    set allowedExtensionTypes(value: Array<string> | undefined);
    get allowedExtensionTypes(): Array<string> | undefined;
    min: number;
    max: number;
    selection: Array<string>;
    readonly: boolean;
    protected getFormElement(): undefined;
    render(): import("lit-html").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        'umb-input-extension': UmbInputExtensionElement;
    }
}
export {};