SAP CLASS EVENTS documentation, setup help and example usage

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Events
In ABAP Objects, events are declared as components of classes. SAP makes a distinction between instance events and static events. Triggers and handlers can be objects and classes, depending on whether they are instance events, static events, or event handlers.

Instance events
Instance events are declared using the EVENTS statement. They can only be triggered in instance methods.

Static events
Static events are declared using the
CLASS-EVENTS statement. All methods (instance or static) can trigger them, but only static events can be triggered by static methods.