A widget for displaying an indicator on a selected object.
    
    
    
    
    
    
        
| Name | Type | Description | 
|---|---|---|
| container | Element | String | The DOM element or ID that will contain the widget. | 
| scene | Scene | The Scene instance to use. | 
Throws:
- 
    DeveloperError : Element with id "container" does not exist in the document.
