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The GeneratesEvent ReferenceType is a concrete ReferenceType and can be used directly. It is a subtype of NonHierarchicalReferences.
The semantic of this ReferenceType is to identify the types of Events instances of ObjectTypes or VariableTypes may generate and Methods may generate on each Method call.
The SourceNode of References of this type shall be an ObjectType, a VariableType or a Method.
The TargetNode of this ReferenceType shall be an ObjectType representing EventTypes, that is, the BaseEventType or one of its subtypes.