import { default as React, ReactElement } from 'react';
import { TabProps } from './tab';
export declare const IS_TAB: unique symbol;
/**
 * Type guard that checks whether a React node is a Tab component.
 *
 * Identifies Tab elements by the internal {@link IS_TAB} symbol
 * attached to the component type.
 *
 * @param el - React node to test.
 * @returns `true` if the node is a Tab element.
 *
 * @internal
 */
export declare function isTab(el: React.ReactNode): el is ReactElement<TabProps>;