static [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * GetAllTrianglePolygroupIDs ( [UDynamicMesh](API\Runtime\GeometryFramework\UDynamicMesh) * TargetMesh, [FGeometryScriptGroupLayer](API\Plugins\GeometryScriptingCore\GeometryScript\FGeometryScriptGroupLayer) GroupLayer, [FGeometryScriptIndexList](API\Plugins\GeometryScriptingCore\GeometryScript\FGeometryScriptIndexList) & PolygroupIDsOut )