import org.gradle.declarative.dsl.model.annotations.Restricted;

            @Restricted
            public interface DependenciesExtension extends Dependencies {
                DependencyCollector getSomething();
                DependencyCollector getSomethingElse();
            }
        """
        file("build-logic/src/main/java/com/example/restricted/LibraryExtension.java") << defineLibraryExtension()