HelperList action 'delete' does not receive the ID - prestashop

Question

I've created a list which is fully populated with records from database. I'd like to add a button 'delete' in order to delete records on demand. The button appears, but whenever it makes a request, it does not have an ID of the record I want to delete. The URL looks like this:
controller=AdminModules&configure=estimateddelivery&=&deleteestimateddelivery&token=6d1625ddf520e0bf8d2c43bea84f21d3
There is a &=& which if I understand correctly should be populated with something like &id=10&. I am not sure what the problem is or where to look at. I've check code examples of similar functionalities and it looks like I am doing everything the same way.
public function renderList()
{
$this->$fields_list = [
'id_estimateddelivery' => [
'title' => $this->l('ID'),
'type' =>'text',
],
'from' => [
'title' => $this->l('Delivery period from')
],
'to' => [
'title' => $this->l('Delivery period to')
],
'countries' => [
'title' => $this->l('Countries applicable'),
'type' => 'text'
]
];
$helper = new HelperList();
$helper->module = $this;
$helper->shopLinkType = '';
$helper->simple_header = true;
$helper->idientifier = 'id_estimateddelivery';
$helper->actions = [
'delete'
];
$helper->show_toolbar = false;
$helper->title = $this->l('List of created estimated deliveries');
$helper->table = $this->name;
$helper->token = Tools::getAdminTokenLite('AdminModules');
$helper->currentIndex = AdminController::$currentIndex . '&configure=' . $this->name;
return $helper->generateList($this->getEstimatedDeliveries(), $this->$fields_list);
}
public function deleteEstimatedDelivery()
{
return Db::getInstance()->execute('DELETE FROM '. _DB_PREFIX_ .'estimateddelivery WHERE `id_estimateddelivery` = '. (int)Tools::getValue('id_estimateddelivery'));
}
else if(Tools::isSubmit('delete' . $this->name))
{
if(!$this->deleteEstimatedDelivery())
$output . $this->displayError($this->l('An error occured during link deletion'));
else
$output . $this->displayConfirmation($this->l('The estimated delivery has been deleted'));
}

Answer 1

Even though there was no error message, the code line: $helper->idientifier = 'id_estimateddelivery'; had a typo. Should have been identifier.