static [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * DeleteTrianglesFromMesh ( [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * TargetMesh, [FGeometryScriptIndexList](API\Plugins\GeometryScriptingCore\GeometryScript\FGeometryScriptIndexList) TriangleList, int & NumDeleted, bool bDeferChangeNotifications )