CRUDlex\AbstractData::pushEvent PHP Method

    public function pushEvent($moment, $action, \Closure $function)
    {
        $events = isset($this->events[$moment . '.' . $action]) ? $this->events[$moment . '.' . $action] : [];
        $events[] = $function;
        $this->events[$moment . '.' . $action] = $events;
    }

 /**
  * Setups CRUDlex with some events so the passwords get salted and
  * hashed properly.
  *
  * @param AbstractData $data
  * the AbstractData instance managing the users
  *
  * @param string $passwordField
  * the Entity fieldname of the password hash
  *
  * @param string $saltField
  * the Entity fieldname of the password hash salt
  */
 public function addEvents(AbstractData $data, $passwordField = 'password', $saltField = 'salt')
 {
     $that = $this;
     $saltGenFunction = function (Entity $entity) use($saltField, $that) {
         $salt = $that->getSalt(40);
         $entity->set($saltField, $salt);
         return true;
     };
     $data->pushEvent('before', 'create', $saltGenFunction);
     $pwHashFunction = $this->getPWHashFunction($data, $passwordField, $saltField);
     $data->pushEvent('before', 'create', $pwHashFunction);
     $data->pushEvent('before', 'update', $pwHashFunction);
 }