Function getResourcePage

getResourcePage(
moduleId: string,
loader: ResourcePageLoader,
): ResourcePage | null
Factory function to create or retrieve a cached ResourcePage instance. This function implements a singleton pattern per moduleId to ensure that the same component is not loaded multiple times.
Parameters
- moduleId: string
  Globally unique identifier for the resource used for caching
- loader: ResourcePageLoader
  Function that returns a Promise resolving to the component
Returns ResourcePage | null
ResourcePage instance (cached if previously created)
Example
```
// Create a resource for lazy loading
const resource = getResourcePage('UserProfile', () => import('./UserProfile'));
resource.load();

// In a React component with Suspense boundary:
const UserProfile = resource.read();
return <UserProfile userId={userId} />;
```
- Defined in packages/router/src/ResourcePage.tsx:119