/**
 * Recursively extracts plain text content from React children.
 *
 * Useful for converting JSX to plain text for accessibility purposes
 * like screenreader announcements or aria-labels.
 *
 * Also handles components that use a `text` prop instead of children
 * (e.g. the Markdown component).
 *
 * @param children - React children to extract text from
 * @returns Plain text string with all text content joined by spaces
 *
 * @example
 * ```tsx
 * const text = extractTextContent(
 *   <div>Hello <strong>world</strong>!</div>
 * );
 * // Returns: "Hello world !"
 *
 * ```
 */
export declare const extractTextContent: (children: React.ReactNode) => string;