ArcGIS Pro 2.7 API Reference Guide
Fetch() Method

ArcGIS.Desktop.Core Namespace > CustomItemBase Class > Fetch Method : Fetch() Method
Custom items that are containers should implement fetch to populate their child items when they are expanded for the first time in Catalog.
Syntax
public virtual void Fetch()
Public Overloads Overridable Sub Fetch() 
Remarks
Child items should derive from CustomItemBase. Container items must create their own children and add them to their child collection via this.AddRangeToChildren(childItems)
Requirements

Target Platforms: Windows 10, Windows 8.1

See Also

Reference

CustomItemBase Class
CustomItemBase Members
Overload List