Read a setting value as unsigned int within namespace_, with key.
| this |
the [class@Settings] object. |
| namespace_ |
the namespace of the value. |
| key |
the key of the value. |
| cancellable |
a GCancellable or NULL. |
|
the uint value, or 0 if not found or not the right type. If throws is not NULL, then the error is returned. |