private static TestPlugin[] defaultPlugins() {
        return Arrays.stream(TestPlugin.values())
                .filter(TestPlugin::includeByDefault)
                .toArray(TestPlugin[]::new);
    }
Get all plugin classes which are included in the specified plugins
@param plugins One or more plugins which are included in the plugin path.
@return A list of plugin class names
@throws AssertionError if any plugin failed to load, or no plugins were loaded.
connect/runtime/src/test/java/org/apache/kafka/connect/runtime/isolation/TestPlugins.java