@Test
	public void testOnlyFrontendablePluginsAreAvailable() {
		int count = 0;
		List<PluginDescription> allPluginDescriptions = pluginModel.getAllPluginDescriptions();
		for (PluginDescription pluginDescription : allPluginDescriptions) {
			assertTrue(ApplicationLevelPlugin.class.isAssignableFrom(pluginDescription.getPluginClass()));
			count++;
		}

		List<Class<? extends ApplicationLevelPlugin>> classes = ClassSearcher.getClasses(ApplicationLevelPlugin.class);
		assertEquals(count, classes.size());
	}
Test configure the Front End tool
Ghidra/Features/Base/src/test.slow/java/ghidra/framework/plugintool/dialog/ManageFrontEndToolTest.java