/**
 * Wait until at least one element matches the selector, using a
 * `MutationObserver` to react to DOM changes synchronously.
 *
 * Resolution strings (returned as plain text by the IIFE):
 * - `Found: <selector> (waited <ms>ms)` — match observed
 * - `Timeout: selector not found within <ms>ms: <selector>` — gave up
 *
 * The IIFE returns a Promise; CDP's `awaitPromise: true` makes the call block
 * until the Promise resolves. We also enforce a hard CDP-level timeout slightly
 * larger than the user-requested timeout, so a stuck observer can't hang the
 * connection.
 */
export declare const waitForSelector: import("../types").CommandModule;