src/vs/workbench/contrib/extensions/browser/extensionsWorkbenchService.ts/ExtensionsWorkbenchService/outdated
class ExtensionsWorkbenchService:	get outdated(): IExtension[] {
		const allLocal = [];
		if (this.localExtensions) {
			allLocal.push(...this.localExtensions.local);
		}
		if (this.remoteExtensions) {
			allLocal.push(...this.remoteExtensions.local);
		}
		if (this.webExtensions) {
			allLocal.push(...this.webExtensions.local);
		}
		return allLocal.filter(e => e.outdated && e.local && e.state === ExtensionState.Installed);
	}