code: func (e *domEngine) CompoByID(id string) (Compo, error) {
  	e.mutex.RLock()
  	defer e.mutex.RUnlock()
  
  	c, ok := e.compoIDs[id]
  	if !ok {
  		return nil, ErrCompoNotMounted
  	}
  
  	return c.Compo, nil
  }
docs: // CompoByID returns the component with the given identifier.