src/vs/platform/storage/electron-main/storageMainService.ts/StorageMainService/createGlobalStorage
class StorageMainService:	private createGlobalStorage(): IStorageMain {
		if (this.globalStorage) {
			return this.globalStorage; // only once
		}

		this.logService.trace(`StorageMainService: creating global storage`);

		const globalStorage = new GlobalStorageMain(this.getStorageOptions(), this.logService, this.environmentService);

		once(globalStorage.onDidCloseStorage)(() => {
			this.logService.trace(`StorageMainService: closed global storage`);
		});

		return globalStorage;
	}