src/vs/workbench/services/workspaces/browser/abstractWorkspaceEditingService.ts/AbstractWorkspaceEditingService/addFolders
class AbstractWorkspaceEditingService:	addFolders(foldersToAdd: IWorkspaceFolderCreationData[], donotNotifyError: boolean = false): Promise<void> {
		return this.doAddFolders(foldersToAdd, undefined, donotNotifyError);
	}