render.go
func NewTemplateSet() *TemplateSet {
	return &TemplateSet{
		sets: make(map[string]*template.Template),
		dirs: make(map[string]string),
	}
}
func NewTemplateSet() *TemplateSet {
	return &TemplateSet{
		sets: make(map[string]*template.Template),
		dirs: make(map[string]string),
	}
}
// NewTemplateSet initializes a new empty template set.