code: func (t *File_Template) RenderL(m LiteralMap) (string, error) {
  	pm, err := m.Convert()
  	if err != nil {
  		return "", err
  	}
  	return t.Render(pm)
  }
docs: // RenderL renders this template with a LiteralMap, calling its Convert method
  // and passing the result to Render.