PHP method to take full screenshots in codeception

AcceptanceTester.php

<?php


/**
 * Inherited Methods
 * @method void wantToTest($text)
 * @method void wantTo($text)
 * @method void execute($callable)
 * @method void expectTo($prediction)
 * @method void expect($prediction)
 * @method void amGoingTo($argumentation)
 * @method void am($role)
 * @method void lookForwardTo($achieveValue)
 * @method void comment($description)
 * @method \Codeception\Lib\Friend haveFriend($name, $actorClass = NULL)
 *
 * @SuppressWarnings(PHPMD)
*/
class AcceptanceTester extends \Codeception\Actor
{
    use _generated\AcceptanceTesterActions;

   /**
    * Define custom actions here
    */

   public function makeFullScreenshot($name = null)
   {
       // set the width appropriately (to calc the height)
       $this->resizeWindow(1920, 2000);
       $docHeight = $this->executeJS('return document.body.scrollHeight');
       // now reset the height to what's needed.
       $this->resizeWindow(1920, $docHeight);
       $this->makeScreenshot($name);
   }
}