static [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * DeleteSelectedTrianglesFromMesh ( [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * TargetMesh, [FGeometryScriptMeshSelection](API\Plugins\GeometryScriptingCore\GeometryScript\FGeometryScriptMeshSelection) Selection, int & NumDeleted, bool bDeferChangeNotifications )