public function initCustomerCustomerGroups($overrideExisting = true)
    {
        if (null !== $this->collCustomerCustomerGroups && !$overrideExisting) {
            return;
        }
        $this->collCustomerCustomerGroups = new ObjectCollection();
        $this->collCustomerCustomerGroups->setModel('\CustomerGroup\Model\CustomerCustomerGroup');
    }