Event to modify field after submit and before save (backend)... about laraform HOT 2 CLOSED

<?php

namespace App\Forms;

use Laraform;

class MyForm extends Laraform
{
  public $schema = [
    'firstname' => [
      'type' => 'text',
    ],
    'lastname' => [
      'type' => 'text',
    ],
  ];

  public function before() {
    $this->setData(array_merge($this->data, [
      'name' => $this->data['firstname'] . ' ' . $this->data['lastname']
   ])); 
  }
}