It seems like $parameters can also be of type object<self>. However, the property $parameters is declared as type object<Deimos\Config\ConfigObject>. Maybe add an additional type check?

[rez1dent3]

see https://scrutinizer-ci.com/g/DeimosProject/Config/issues/master/files/src/Config/ConfigObject.php?orderField=path&order=asc&honorSelectedPaths=0#inspectioncomment-61449483