/**
 * Compat-mode `{{unique-id}}` — stable per-(render-context, call-site) id.
 *
 * Ember's `{{unique-id}}` returns a unique identifier string that is STABLE for
 * a given call-site across re-renders of the same component instance, and
 * DISTINCT across instances (and across sibling call-sites). Classic Glimmer
 * gets this for free from its per-instance reference cache; GXT's fine-grained
 * getters re-invoke a helper on every read, so a naive `unique-id()` would mint
 * a fresh id each time.
 *
 * The compiler (serializers/value.ts `buildHelper`) assigns every `{{unique-id}}`
 * / `(unique-id)` call-site a stable per-template site index and emits
 * `$_uid(this, SITE_INDEX)`. This runtime helper keeps a `WeakMap<ctx, string[]>`
 * so:
 *   - the SAME ctx + SAME site index returns the SAME id (stable re-renders),
 *   - a DIFFERENT ctx (a different instance) gets a DIFFERENT id,
 *   - a DIFFERENT site index (a sibling `{{unique-id}}`) gets a DIFFERENT id.
 *
 * This retires the Ember bridge's positional call-site rewrite
 * (`$_maybeHelper("unique-id",…)` → `_uid[N]`) and its `uidOuterScope`
 * pre-computed-array injection — the stability now lives in the emission +
 * runtime, not in a host-side code rewrite.
 */
/**
 * Reset the module-global unique-id counter (test hook). Mirrors the
 * `resetNodeCounter` / `resetLogSiteCounter` idioms.
 */
export declare function resetUniqueIdCounter(): void;
export declare function $_uid(ctx: unknown, siteIndex: number): string;