/**
 * Source of the in-page native-stealth toolkit, `afp`.
 *
 * Returned as the body of an IIFE; the injector wraps it as
 * `var afp = (function(){ <this> })();`. The toolkit lives entirely in closure
 * scope — it is NEVER attached to `window`, so there is no `window.__afp` style
 * marker for a detector to find.
 *
 * Design rules embodied here:
 *  - One `Function.prototype.toString` trap, installed once, that returns a
 *    native-looking string for every patched function (and for itself).
 *  - Properties are redefined on their *true prototype owner* (e.g.
 *    `Navigator.prototype`, not the `navigator` instance) so no spurious own
 *    properties appear.
 *  - Methods are replaced with `Proxy` wrappers so `.name` and `.length` stay
 *    correct automatically.
 *  - All originals (`defineProperty`, `getOwnPropertyDescriptor`, …) are
 *    captured up-front before any page script can tamper with them.
 */
export declare function bootstrapSource(): string;
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