Devise\Templates\TemplatesManager::validateInputVars PHP Method

    private function validateInputVars($input)
    {
        if (isset($input['template']['vars'])) {
            foreach ($input['template']['vars'] as $var) {
                if ($var['varName'] == '' || $var['classPath'] == '' || $var['methodName'] == '') {
                    $this->errors = ['Var Name, Class Path and Method Name required'];
                    return false;
                }
            }
        }
        return true;
    }