src/Filter/Setting/CustomSql.php
public static function getSubscribedServices()
    {
        return [
            Connection::class => Connection::class,
            Input::class      => Input::class,
            InsertTags::class => InsertTags::class,
            Session::class    => Session::class,
            // This one is deprecated.
            IMetaModelsServiceContainer::class => IMetaModelsServiceContainer::class
        ];
    }
public static function getSubscribedServices()
    {
        return [
            Connection::class => Connection::class,
            Input::class      => Input::class,
            InsertTags::class => InsertTags::class,
            Session::class    => Session::class,
            // This one is deprecated.
            IMetaModelsServiceContainer::class => IMetaModelsServiceContainer::class
        ];
    }
Get the needed services.

@return array