@Test
    void renderers_named_JsonRenderer_are_not_allowed() {
        assertThrows(IllegalArgumentException.class, () -> {
            createModel(root, generateContainerElementWithRenderer("JsonRenderer"));
        });
    }
Tests for "core functionality" of the container model, e.g. ports, or the 'components' and 'bundles' configs.

Before adding a new test to this class, check if the test fits into one of the other existing subclasses
of {@link ContainerModelBuilderTestBase}. If not, consider creating a new subclass.

@author gjoranv
config-model/src/test/java/com/yahoo/vespa/model/container/xml/ContainerModelBuilderTest.java