key := types.NamespacedName{
		Name:      name,
		Namespace: namespace,
	}

	if matchFunc != nil {
		if f.DefinitionMatchFuncs == nil {
			f.DefinitionMatchFuncs = make(map[types.NamespacedName]func(generic.PolicyAccessor, admission.Attributes) bool)
		}
		f.DefinitionMatchFuncs[key] = matchFunc
	}
}