topOrigin property
      
      String
      get
      topOrigin
      
    
    
    
Implementation
String get topOrigin => js_util.getProperty(this, 'topOrigin');
      
      set
      topOrigin
      (String newValue) 
      
    
    
    
Implementation
set topOrigin(String newValue) {
  js_util.setProperty(this, 'topOrigin', newValue);
}