whmcsDNSManager/modules/addons/DNSManager2/mgLibs/custom/CoreManager.php

<?php

namespace MGModule\DNSManager2\mgLibs\custom;

use MGModule\DNSManager2\mgLibs\custom\dns;

class CoreManager {    
    public static function getConfiguration($module_name) {
        return dns\Core::getModule($module_name)->getConfiguration();
    }
    
    public static function testConnection($module_name, $configuration) {
        $module = dns\Core::getModule($module_name);
        $module->setConfiguration($configuration);
        return $module->testConnection();
    }
}