Creates or returns a proxy for the native object - i.e. a new object that represents this object but adds the assembly context defined by the input occurrence.
"draftFeature_var" is a variable referencing a DraftFeature object. | 
        
"draftFeature_var" is a variable referencing a DraftFeature object. | 
        
| Type | Description | 
| DraftFeature | Returns the proxy object or null if this isn't the NativeObject. | 
| Name | Type | Description | 
| occurrence | Occurrence | The occurrence that defines the context to create the proxy in. |