### Question:
ModuleBuilder extends AbstractBuilder<ModuleConfig, ModuleBuilder> { public ModuleBuilder isDefault(Boolean isDefault) { this.isDefault = isDefault; return getThis(); }  ModuleBuilder name(String name); ModuleBuilder version(String version); ModuleBuilder owner(String owner); ModuleBuilder organization(String organization); ModuleBuilder addRegistries(List<? extends RegistryConfig> registries); ModuleBuilder addRegistry(RegistryConfig registry); ModuleBuilder monitor(MonitorConfig monitor); ModuleBuilder isDefault(Boolean isDefault); ModuleConfig build();  }### Answer:
@Test void isDefault() { ModuleBuilder builder = new ModuleBuilder(); builder.isDefault(true); Assertions.assertTrue(builder.build().isDefault()); }