src/vs/workbench/services/workspaces/browser/abstractWorkspaceEditingService.ts/AbstractWorkspaceEditingService/doUpdateFolders
class AbstractWorkspaceEditingService:	private async doUpdateFolders(foldersToAdd: IWorkspaceFolderCreationData[], foldersToDelete: URI[], index?: number, donotNotifyError: boolean = false): Promise<void> {
		try {
			await this.contextService.updateFolders(foldersToAdd, foldersToDelete, index);
		} catch (error) {
			if (donotNotifyError) {
				throw error;
			}

			this.handleWorkspaceConfigurationEditingError(error);
		}
	}