Constructor error for Model class AdminSample.php

[VivekShingala]

I am getting an error for constructor parameter (ConfigHelper) of Model class AdminSample.php. I am getting below error.

Warning: Declaration of Tym17\AdminSample\Model\AdminSample::_construct(Tym17\AdminSample\Helper\ConfigHelper $config) should be compatible with Magento\Framework\Model\AbstractModel::_construct() in D:\xampp\htdocs\magento2\app\code\Tym17\AdminSample\Model\AdminSample.php on line 9