code: func (e *Engine) ExecuteWriter(out io.Writer, name string, binding interface{}, options ...map[string]interface{}) error {
  	if tmpl := e.fromCache(name); tmpl != nil {
  		return tmpl.ExecuteTemplate(out, name, binding)
  	}
  
  	return fmt.Errorf("[IRIS TEMPLATES] Template with name %s doesn't exists in the dir", name)
  }
docs: // ExecuteWriter executes a templates and write its results to the out writer