/**
 * Extracts the page key from a given pathname.
 * @param pathname The current pathname (e.g., from window.location.pathname).
 * @param basePathToRemove Optional base path to remove before extracting the page key.
 * @example "/users/" -> "users"
 * @example "/admin/users/" with basePathToRemove "/admin" -> "users"
 * @example "/dashboard/home" -> "home"
 * @example "/table/users/"" -> "users"
 * @example "/-/data-sources" -> undefined
 * @returns The extracted page key.
 */
export declare function getPageKeyFromPathname(pathname: string, basePathToRemove?: string): string | undefined;