// this Template.
func (t Template) ContainsWellKnown(p WellKnown) bool {
	return t.Contains(p.String())
}

// MissingParams checks the provided params against the parameters used in this Template.
// Returns the set of template parameters not defined in params.
func (t Template) MissingParams(params Params) sets.String {
	out := sets.New[string]()
	for needed := range t.params {
		if !params.Contains(needed) {

		for _, s := range s.SplitOrFail(b.t) {
			// If the caller set namespaces with literal strings, replace with namespace.Instance objects.
			s = replaceNamespaceStrings(s)

			tpl := s.TemplateOrFail(out.t)
			need := tpl.MissingParams(s.Params())
			needFrom := need.Contains(param.From.String())
			needTo := need.Contains(param.To.String())

			if needFrom && needTo {
				out.needFromAndTo = append(out.needFromAndTo, s)
			} else if needFrom {