Render menu navigation menu Drupal 8

function.php

<?php
function render_menu_navigation($menu_name,$theme_alter = ''){
    //Set system menu mobile
    $menu_tree = \Drupal::menuTree();
    // Build the typical default set of menu tree parameters.
    $parameters = $menu_tree->getCurrentRouteMenuTreeParameters($menu_name);
    // Load the tree based on this set of parameters.
    $tree = $menu_tree->load($menu_name, $parameters);
    // Transform the tree using the manipulators you want.
    $manipulators = array(
        // Only show links that are accessible for the current user.
        array('callable' => 'menu.default_tree_manipulators:checkAccess'),
        // Use the default sorting of menu links.
        array('callable' => 'menu.default_tree_manipulators:generateIndexAndSort'),
    );
    $tree = $menu_tree->transform($tree, $manipulators);
    // Finally, build a renderable array from the transformed tree.
    $menu = $menu_tree->build($tree);
    if(!empty($theme_alter)){
        $menu['#theme'] = $theme_alter;
    }
    return \Drupal::service('renderer')->render($menu);
}