META-INF/spring.factories
    example.MyService=example.MyServiceImpl1,example.MyServiceImpl2

List<Foo> foos = SpringFactoriesLoader.loadFactories(Foo.class, null);

https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/beans/factory/serviceloader/package-summary.html
https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/core/io/support/SpringFactoriesLoader.html

2017
https://dzone.com/articles/java-service-loader-vs-spring-factories-loader