@Test
    @Ignore // Just to test memory usage
    public void testMemUseConcrete() {
        final DocumentTypeManager mgr = typeManagerForBookType();
        List<Book> manyConcreteBooks = new ArrayList<>();
        for (int i = 0; i < NUM_BOOKS; i++) {
            manyConcreteBooks.add(newBookConcrete(i));
        }
        assertEquals(NUM_BOOKS, manyConcreteBooks.size());
    }
Tests vespa-documentgen-plugin

@author vegardh
documentgen-test/src/test/java/com/yahoo/vespa/config/DocumentGenPluginTest.java