import { LitElement } from 'lit';
/**
 * @element nve-toggletip-header
 * @description Displays a title or contextual label at the top of a toggletip to categorize its contents.
 * @since 0.38.0
 * @entrypoint \@nvidia-elements/core/toggletip
 * @slot - default slot for the toggletip header
 * @cssprop --border-bottom
 * @cssprop --padding
 * @cssprop --border-radius
 *
 */
export declare class ToggletipHeader extends LitElement {
    static styles: import('lit').CSSResult[];
    static readonly metadata: {
        tag: string;
        version: string;
        parents: string[];
    };
    render(): import('lit').TemplateResult<1>;
    connectedCallback(): void;
}