ArcGIS Pro 2.7 API Reference Guide
Fetch Method (CustomItemBase)

ArcGIS.Desktop.Core Namespace > CustomItemBase Class : Fetch Method
Overload List
OverloadDescription
Custom items that are containers should implement fetch to populate their child items when they are expanded for the first time in Catalog.  
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

CustomItemBase Class
CustomItemBase Members