Help me in locating MaxLOD of FCurveMetaData in UE4.17

One of my buddy located FCurveMetaData but MaxLOD isn’t there in UE4.17
https://github.com/EpicGames/UnrealEngine/blob/4.17/Engine/Source/Runtime/Engine/Classes/Animation/SmartName.h#L37

He stated that MaxLOD can be found in other UE4 version so can anyone help us finding MaxLOD of FCurveMetaData in UE4.17?