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API > API/Plugins > API/Plugins/MassEntity > API/Plugins/MassEntity/FMassSubsystemRequirements > API/Plugins/MassEntity/FMassSubsystemRequirements/AddSubsystemRequirement
References
| Module | MassEntity |
| Header | /Engine/Plugins/Runtime/MassEntity/Source/MassEntity/Public/MassRequirements.h |
| Include | #include "MassRequirements.h" |
FMassSubsystemRequirements & AddSubsystemRequirement
&40;
const TSubclassOf< USubsystem > SubsystemClass,
const EMassFragmentAccess AccessMode,
const bool bGameThreadOnly
&41;