ArcGIS Pro 3.4 API Reference Guide
ArcGIS.Core.Events Namespace / RegisteredPresentationEvent<TSubscriptionParam,TPayload> Class / Contains Method
Version

Contains Method (RegisteredPresentationEvent<TSubscriptionParam,TPayload>)
Overload List
OverloadDescription
Returns true if there is a subscriber matching SubscriptionToken.  
Returns true if there is a subscriber matching .  
Requirements

Target Platforms: Windows 11, Windows 10

ArcGIS Pro version: 3 or higher.
See Also