code: func Update(c *messagebird.Client, id string, req *UpdateRequest) (*Conversation, error) {
  	conv := &Conversation{}
  	if err := request(c, conv, http.MethodPatch, path+"/"+id, req); err != nil {
  		return nil, err
  	}
  
  	return conv, nil
  }
docs: // Update changes the conversation's status, so this can be used to (un)archive
  // conversations.