/**
 * The content panel associated with an `r-tab`, shown when its corresponding tab is active.
 *
 * Example
 * ```
 * <r-tabs>
 *   <r-tabs-list variant="expanded">
 *     <r-tab panel-id="overview" active>Overview</r-tab>
 *     <r-tab panel-id="details">Details</r-tab>
 *   </r-tabs-list>
 *   <r-tab-panel tab-id="overview" active>Overview content.</r-tab-panel>
 *   <r-tab-panel tab-id="details">Details content.</r-tab-panel>
 * </r-tabs>
 * ```
 *
 * @slot - Content displayed inside the tab panel when it is active
 */
export declare class RTabPanel {
    /** Defines if the `panel` is hidden */
    active: boolean;
    /** Id of the 'tab' connected to this `panel` */
    tabId?: string;
    render(): any;
}