static void SetOrAddKey ( [TMovieSceneChannelData](API\Runtime\MovieScene\Channels\TMovieSceneChannelData)< [FMovieSceneFloatValue](API\Runtime\MovieScene\Channels\FMovieSceneFloatValue) > & ChannelData, [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) Time, float Value, const EMovieSceneKeyInterpolation Interpolation )