/**
 * Wait until `document.body.textContent` contains the requested substring.
 * Uses `MutationObserver` with `characterData: true` so we react to text node
 * mutations as well as new nodes being inserted.
 *
 * Resolution strings:
 * - `Found: text appeared (waited <ms>ms)`
 * - `Timeout: text not found within <ms>ms: <text>`
 *
 * Note: this is a substring match against the *entire* body, so callers
 * looking for tighter scoping should pair it with `wait_for_selector`.
 */
export declare const waitForText: import("../types").CommandModule;