/**
  * Constructor. Sets $this->abstractViewHelperReflectionClass
  *
  */
 public function __construct()
 {
     Fluid::$debugMode = true;
     // We want ViewHelper argument documentation
     $this->abstractViewHelperReflectionClass = new ClassReflection(\TYPO3\Fluid\Core\ViewHelper\AbstractViewHelper::class);
 }
 /**
  * Constructor. Sets $this->abstractViewHelperReflectionClass
  *
  */
 public function __construct()
 {
     Fluid::$debugMode = TRUE;
     // We want ViewHelper argument documentation
     $this->abstractViewHelperReflectionClass = new ClassReflection('TYPO3\\Fluid\\Core\\ViewHelper\\AbstractViewHelper');
 }
<?php

define('FLUID_ROOT_PATH', realpath(__DIR__ . '/../') . '/');
require_once FLUID_ROOT_PATH . 'Classes/TYPO3/Fluid/Fluid.php';
\TYPO3\Fluid\Fluid::initialize();