Method has

src/browser/stores/MapStore.ts:71–73

* Check if key has been bumped (has versioned state). * Returns false for keys that were only get() without bump().

(key: K)

   * Returns false for keys that were only get() without bump().
   */
  has(key: K): boolean {
    return this.versions.has(key);
  }

  /**
   * Bump version for a key, invalidating cache and notifying subscribers.