displayShoppingCartFooter Hook is not working in my custom module

[bristolking 0]

@vekia I have a custom module with the following code in the  displayShoppingCartFooter Hook for displaying contents from .tpl file just above the cart navigation but it doesn't works and doesn't display anything - can you advice what is the thing I am missing here.

 public function hookDisplayShoppingCartFooter($params)
  {
        $this->context->smarty->assign('module_dir', $this->_path);
        this->display(__FILE__, 'views/templates/hook/shoppingcart.tpl'); 
 }