src/vs/workbench/services/userData/browser/userDataInit.ts/ExtensionsPreviewInitializer/doInitialize
class ExtensionsPreviewInitializer:	protected override async doInitialize(remoteUserData: IRemoteUserData): Promise<void> {
		const remoteExtensions = await this.parseExtensions(remoteUserData);
		if (!remoteExtensions) {
			this.logService.info('Skipping initializing extensions because remote extensions does not exist.');
			return;
		}
		const installedExtensions = await this.extensionManagementService.getInstalled();
		this.preview = this.generatePreview(remoteExtensions, installedExtensions);
	}