Nova Computed Field access Belongs to ->Belongs To

I am trying to use the computed field to get field of a relation of a relation For example I have a City Resource and a City Belongs to a Region which belongs to a Country I want to use the computed field like this:

In the Nova City resource:

Text::make('Country Name', function () { return $this->region->country->name; }),

And get the error 'trying to get property of non-object'

However if I specify return $this->region->country I get value returned as { "id": 5, "name": "France", "type": "2" ... }

Then I tried calling a function and logging the results. logging

Log::debug('Country Name.', ['vn' => $this->country]); return $this->country;

{"country_name":{"App\\Models\\Country":{"id":1,"name":"France" }}}

How do I extract the country name?