src/vs/platform/storage/electron-main/storageMainService.ts/StorageMainService/workspaceStorage
class StorageMainService:	workspaceStorage(workspace: IWorkspaceIdentifier | ISingleFolderWorkspaceIdentifier | IEmptyWorkspaceIdentifier): IStorageMain {
		let workspaceStorage = this.mapWorkspaceToStorage.get(workspace.id);
		if (!workspaceStorage) {
			this.logService.trace(`StorageMainService: creating workspace storage (${workspace.id})`);

			workspaceStorage = this.createWorkspaceStorage(workspace);
			this.mapWorkspaceToStorage.set(workspace.id, workspaceStorage);

			once(workspaceStorage.onDidCloseStorage)(() => {
				this.logService.trace(`StorageMainService: closed workspace storage (${workspace.id})`);

				this.mapWorkspaceToStorage.delete(workspace.id);
			});
		}

		return workspaceStorage;
	}