static [UMediaSource](API\Runtime\MediaAssets\UMediaSource) * GetMediaSourceOrProxy ( [IMovieScenePlayer](API\Runtime\MovieScene\IMovieScenePlayer) & InPlayer, [FMovieSceneSequenceID](API\Runtime\MovieScene\FMovieSceneSequenceID) InSequenceID, [UMediaSource](API\Runtime\MediaAssets\UMediaSource) * InMediaSource, const [FMovieSceneObjectBindingID](API\Runtime\MovieScene\FMovieSceneObjectBindingID) & InMediaSourceProxyBindingID, int32 InMediaSourceProxyIndex )