How to use saveMany in cakephp 3.2.7

Question

Having problems with saveMany() on a cake 3.2.7 install. It give an error Unknown method "saveMany".

$cartArrSave =     Array
    (
        [0] => Array
            (
                [deal_id] => 4
                [store_id] => 126
                [user_id] => 124
                [quantity] => 1
            )

        [1] => Array
            (
                [deal_id] => 9
                [store_id] => 127
                [user_id] => 124
                [quantity] => 1
            )

    )
    $this->Deals = TableRegistry::get('Deals');


    if(!empty($cartArrSave)){
        $this->Deals->newEntities($cartArrSave);  
        $this->Deals->saveMany($cartArrSave);  
    }

I have checked that saveMany is supported in even cakephp 2

And also its supported in cakephp 3.x

Then why its giving such error?
Please suggest any alternative to saveMany function in cakephp 2.7.8?