var_dump still in the module

Index.php

<?php
/**
*
* Do not edit or add to this file if you wish to upgrade the module to newer
* versions in the future. If you wish to customize the module for your
* needs please contact us to https://www.milople.com/contact-us.html
*
* @category    Ecommerce
* @package     Milople_Stripe
* @copyright   Copyright (c) 2018 Milople Technologies Pvt. Ltd. All Rights Reserved.
* @url         https://www.milople.com/magento2-extensions/ecurring-and-subscription-payments-m2.html
*
**/
namespace Milople\Stripe\Controller\Index;

class Index extends \Magento\Framework\App\Action\Action
{
    protected $resultJsonFactory;
    protected $regionColFactory;
	public function __construct(
	\Magento\Framework\App\Action\Context $context,
	\Magento\Framework\Controller\Result\JsonFactory $resultJsonFactory,
	\Magento\Directory\Model\RegionFactory $regionColFactory)
    {
		$this->regionColFactory     	= $regionColFactory;
		$this->resultJsonFactory     	= $resultJsonFactory;
		parent::__construct($context);
	}

	public function execute()
	{
		$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
		$partialpaymentHelper = $objectManager->create('Milople\Stripe\Helper\PartialPayment');
		$orderid = 6;
		$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
		$order = $objectManager->create('Magento\Sales\Api\Data\OrderInterface')->load($orderid);

		var_dump($partialpaymentHelper->getDownPayment($order));
		/* $result = $this->resultJsonFactory->create();
		$regions=$this->regionColFactory->create()->getCollection()->addFieldToFilter('country_id',$this->getRequest()->getParam('country'));

		$html = '';

		if(count($regions) > 0)
		{
				 $html.='<option selected="selected" value="">Please select a region, state or province.</option>';
				 foreach($regions as $state)
				 {
							 $html.=    '<option  value="'.$state->getName().'">'.$state->getName().'.</option>';
				 }
		}
		return $result->setData(['success' => true,'value'=>$html]); */
	}
}