public function getModelsClasses($modelsPath, $modelsNamespace)
    {
        $path = Yii::getAlias($modelsPath);
        $files = @scandir($path);

        if ($files === false) {
            throw new InvalidConfigException('Path to sitemap models "' . $modelsPath . '"(' .
                $path . ') is incorrect');
        }

        $buffer = [];
        foreach ($files as $file) {
            if ($file == '.' || $file == '..' || !is_file($path . DIRECTORY_SEPARATOR . $file)) {
                continue;
            }

            // Search only .php files
            $ext = substr($file, -4);
            if ($ext !== '.php') {
                continue;
            }

            // Combine model class name
            $className = $modelsNamespace . '\\' . str_replace($ext, '', $file);

            // Create new model instance
            $model = Yii::createObject($className);

            if (!$model instanceof Basic) {
                $this->printMessage('Warning: model "' . $className . '" does not implement interface ' .
                    '"demi\sitemap\interfaces\Basic"');

                continue;
            }

            // Add class to list
            $buffer[] = $model;

            // Analysis xml-schemas by $model interfaces
            $this->collectSchemas($model);
        }

        return $buffer;
    }