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API > API/Plugins > API/Plugins/MassEntity > API/Plugins/MassEntity/FMassObserverManager
References
| Module | MassEntity |
| Header | /Engine/Plugins/Runtime/MassEntity/Source/MassEntity/Public/MassObserverManager.h |
| Include | #include "MassObserverManager.h" |
bool OnPreCompositionRemoved
&40;
const FMassEntityHandle Entity,
const FMassArchetypeCompositionDescriptor & Composition
&41;