src/vs/workbench/api/browser/mainThreadDocumentContentProviders.ts/MainThreadDocumentContentProviders/$unregisterTextContentProvider
class MainThreadDocumentContentProviders:	$unregisterTextContentProvider(handle: number): void {
		const registration = this._resourceContentProvider.get(handle);
		if (registration) {
			registration.dispose();
			this._resourceContentProvider.delete(handle);
		}
	}