/**
* Add customer
*
* @param Customer $customer
* @return CustomerGroup
*/
public function addCustomer(Customer $customer)
{
if (!$this->customers->contains($customer)) {
$this->customers->add($customer);
}
return $this;
}
/**
* Add child
*
* @param Customer $child
* @return Customer
*/
public function addChild(Customer $child)
{
if (!$this->hasChild($child)) {
$child->setParent($this);
$this->children->add($child);
}
return $this;
}