src/vs/workbench/services/extensions/electron-browser/extensionService.ts/ExtensionService/_scanAllLocalExtensions
class ExtensionService:	private async _scanAllLocalExtensions(): Promise<IExtensionDescription[]> {
		return flatten(await Promise.all([
			this._extensionScanner.scannedExtensions,
			this._scanWebExtensions(),
		]));
	}