/**
 * 🎯 Marks a class field as reactive. Whenever the field's setter
 * is invoked, any React components consuming it through `useObserved`
 * will re-render automatically.
 *
 * 👉 Only works on public instance accessors (not on static members).
 *
 * Usage:
 * ```typescript
 * class Counter {
 *   @observable accessor count: number = 0;
 * }
 *
 * const c = new Counter();
 * c.count = 5; // any hooked components will update
 * ```
 */
export declare function observable<T extends object, V>(target: ClassAccessorDecoratorTarget<T, V>, context: ClassAccessorDecoratorContext<T, V> & {
    static: false;
}): ClassAccessorDecoratorResult<T, V>;