merge method
Merges the current object with another MatexCountryMetadata model.
Prioritizes the properties of the provided model
unless they're null,
then it uses the current properties.
Implementation
@override
MatexCountryMetadata merge(covariant MatexCountryMetadata model) {
return MatexCountryMetadata(
vatRates: model.vatRates ?? vatRates,
currency: model.currency,
code: model.code,
id: model.id,
);
}