code: func MatchNamespace(label labels.Selector, field fields.Selector) apistorage.SelectionPredicate {
  	return apistorage.SelectionPredicate{
  		Label:    label,
  		Field:    field,
  		GetAttrs: GetAttrs,
  	}
  }
docs: // MatchNamespace returns a generic matcher for a given label and field selector.