import type { CSSResultGroup } from '../../external/lit/index.js';
import { LitElement } from '../../external/lit/index.js';
import type { UpgradeSettingsResponseModel } from '../../packages/core/backend-api/index.js';
/**
 * @element umb-upgrader-view
 * @fires {CustomEvent<SubmitEvent>} onAuthorizeUpgrade - fires when the user clicks the continue button
 */
export declare class UmbUpgraderViewElement extends LitElement {
    #private;
    fetching: boolean;
    upgrading: boolean;
    errorMessage: string;
    settings?: UpgradeSettingsResponseModel;
    private _renderLayout;
    private _renderError;
    render(): import("lit-html").TemplateResult<1>;
    static styles: CSSResultGroup;
}
export default UmbUpgraderViewElement;
declare global {
    interface HTMLElementTagNameMap {
        'umb-upgrader-view': UmbUpgraderViewElement;
    }
}