public function provideValidCategoryGroupDefinitions()
{
return ['emptyArray' => ['groupDefinitions' => []], 'single group' => ['groupDefinitions' => ['groupHandle1' => ['name' => 'groupName1', 'hasUrls' => false, 'template' => '', 'maxLevels' => 3, 'locales' => ['en' => ['urlFormat' => '', 'nestedUrlFormat' => '']], 'fieldLayout' => ['fields' => []]]]]];
}