code: func (p *WebPage) Page(name string) (*WebPage, error) {
  	var resp struct {
  		Ref refJSON `json:"ref"`
  	}
  	if err := p.ref.process.doJSON("POST", "/webpage/Page", map[string]interface{}{"ref": p.ref.id, "name": name}, &resp); err != nil {
  		return nil, err
  	}
  	if resp.Ref.ID == "" {
  		return nil, nil
  	}
  	return &WebPage{ref: newRef(p.ref.process, resp.Ref.ID)}, nil
  }
docs: // Page returns an owned page by window name.
  // Returns nil if the page cannot be found.