/**
 * Parses a relative path to extract version folder information.
 *
 * - A valid versioned path contains exactly one segment starting with `@`,
 *   excluding `@i18n/` and `@l10n/` prefixes.
 * - When valid, returns the version folder path, the file path within that
 *   version, and the version name. Otherwise, returns `null`.
 *
 * @param relativePath - The relative path to parse (e.g., "@v1/docs/intro.md").
 * @returns An object with `versionFolderPath`, `filePathInVersion`, and `versionName`, or `null`.
 *
 * @example
 * ```ts
 * parsePathVersions('@v1/docs/intro.md');
 * // { versionFolderPath: '@v1/', filePathInVersion: 'docs/intro.md', versionName: 'v1' }
 *
 * parsePathVersions('docs/intro.md');
 * // null
 * ```
 */
export declare function parsePathVersions(relativePath: string): {
    versionFolderPath: string;
    filePathInVersion: string;
    versionName: string;
} | null;
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