code: func (o *LabelOptions) Validate() error {
  	if o.all && len(o.selector) > 0 {
  		return fmt.Errorf("cannot set --all and --selector at the same time")
  	}
  	if o.all && len(o.fieldSelector) > 0 {
  		return fmt.Errorf("cannot set --all and --field-selector at the same time")
  	}
  	if len(o.resources) < 1 && cmdutil.IsFilenameSliceEmpty(o.FilenameOptions.Filenames, o.FilenameOptions.Kustomize) {
  		return fmt.Errorf("one or more resources must be specified as <resource> <name> or <resource>/<name>")
  	}
  	if len(o.newLabels) < 1 && len(o.removeLabels) < 1 && !o.list {
  		return fmt.Errorf("at least one label update is required")
  	}
  	return nil
  }
docs: // Validate checks to the LabelOptions to see if there is sufficient information run the command.