| Overload | Description | 
|---|---|
| Fetch | Custom items that are containers should implement fetch to populate their child items when they are expanded for the first time in Catalog. | 
| Overload | Description | 
|---|---|
| Fetch | Custom items that are containers should implement fetch to populate their child items when they are expanded for the first time in Catalog. | 
Target Platforms: Windows 10, Windows 8.1