const DeleteTreeError: type = error{InvalidHandle, AccessDenied, FileTooBig, SymLinkLoop, ProcessFdQuotaExceeded, NameTooLong, SystemFdQuotaExceeded, NoDevice, SystemResources, ReadOnlyFileSystem, FileSystem, FileBusy, DeviceBusy, NotDir, InvalidUtf8, BadPathName, NetworkNotFound} || os.UnexpectedError;