static [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * UpdateVertexNormal ( [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * TargetMesh, int VertexID, bool bUpdateNormal, FVector NewNormal, bool bUpdateTangents, FVector NewTangentX, FVector NewTangentY, bool & bIsValidVertex, bool bMergeSplitValues, bool bDeferChangeNotifications )