Comment by jeyjeyemem

Definitely! There's no limit on what configuration formats Externalized Properties can support as you can implement custom `Resolver`s to retrieve from any source and format e.g.

    public class PklResolver implements Resolver {
        public Optional<String> resolve(InvocationContext context, String propertyName) {
            return getFromPklConfig(propertyName);
        }
    }


    // Register custom resolver when building ExternalizedProperties

    ExternalizedProperties externalizedProperties = ExternalizedProperties.builder()
        .resolvers(new PklResolver(...))
        .build();

    AppProperties appProperties = externalizedProperties.initialize(AppProperties.class);

    // Resolves config from PklResolver

    String myConfig = appProperties.myConfig();