EventSystemV2 

Demonstration of basic functions of Event System V2 version content
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Event dispatchers using Blueprints will inevitably reference the event delegate source object class and add a Blueprint file reference. This message event system will release this reference to achieve the purpose of decoupling.
Customize listening event nodes (supports network replication).
Notification message event node: used to trigger all bound listening events, such as Widget updates when the health value changes, etc.