a custom file that extends the ApiQueryGeneratorBase abstract base class, by adding
ApiQueryGeneratorBase to the list of classes that the autoloader knows how to handle.
'ApiQuery' => 'includes/api/ApiQuery.php',
'ApiQueryAllpages' => 'includes/api/ApiQueryAllpages.php',
'ApiQueryBase' => 'includes/api/ApiQueryBase.php',
+ 'ApiQueryGeneratorBase' => 'includes/api/ApiQueryBase.php',
'ApiQueryBacklinks' => 'includes/api/ApiQueryBacklinks.php',
'ApiQueryCategories' => 'includes/api/ApiQueryCategories.php',
'ApiQueryCategoryMembers' => 'includes/api/ApiQueryCategoryMembers.php',