References
- Mustache: https://zhuanlan.zhihu.com/p/36572041
- https://github.com/redhat-appdev-practice/openapi-jboss-jpa-templates/blob/trunk/apiServiceImpl.mustache
- https://github.com/redhat-appdev-practice/spring-data-openapi-templates
- https://mustache.github.io/mustache.5.html
- https://github.com/samskivert/jmustache
- https://stackoverflow.com/questions/59072297/openapi-generator-reference-an-external-pojo-in-yaml-file-specification