un.GetKind(), un.GetNamespace(), un.GetName())))
		}
	}
}

func isFileFormatValid(file string) bool {
	ext := filepath.Ext(file)
	return slices.Contains(fileExtensions, ext)
}

func validateFiles(istioNamespace *string, defaultNamespace string, filenames []string, writer io.Writer) error {
	if len(filenames) == 0 {
		return errMissingFilename
	}

	v := &validator{}

	var errs error