Method has

apps/client/src/code/pages/page-cache.ts:26–28

(pageId: string)

    return this.react.cache.find((page) => page.id === pageId) ?? null;
  }
  has(pageId: string): boolean {
    return this.get(pageId) != null;
  }

  add(page: Page): void {
    this.react.cache.push(page);