forked from loafle/openapi-generator-original
* fixed null-coalescing operator incorrectly used for primitive types with the same change than @jafin in https://github.com/OpenAPITools/openapi-generator/pull/11427
* fixed null-coalescing operator incorrectly used for primitive types with the same change than @jafin in https://github.com/OpenAPITools/openapi-generator/pull/11427