Method onSubscribe

packages/query-core/src/queriesObserver.ts:59–67

()

  }

  protected onSubscribe(): void {
    if (this.listeners.size === 1) {
      this.#observers.forEach((observer) => {
        observer.subscribe((result) => {
          this.#onUpdate(observer, result)
        })
      })
    }
  }

  protected onUnsubscribe(): void {
    if (!this.listeners.size) {